CELEX: 42011X0330(02)
Language: en
Date: 2011-03-30 00:00:00
Title: Regulation No 75 of the Economic Commission for Europe of the United Nations (UN/ECE) — Uniform provisions concerning the approval of pneumatic tyres for motor cycles and mopeds

30.3.2011   
            
            
               EN
            
            
               Official Journal of the European Union
            
            
               L 84/46
            
         Only the original UN/ECE texts have legal effect under international public law. The status and date of entry into force of this Regulation should be checked in the latest version of the UN/ECE status document TRANS/WP.29/343, available at:
   http://www.unece.org/trans/main/wp29/wp29wgs/wp29gen/wp29fdocstts.html
   Regulation No 75 of the Economic Commission for Europe of the United Nations (UN/ECE) — Uniform provisions concerning the approval of pneumatic tyres for motor cycles and mopeds
   Incorporating all valid text up to:
   Supplement 13 to the Regulation in its original form — Date of entry into force: 24 October 2009
   CONTENTS
   REGULATION
   
               1.
            
            Scope
         
               2.
            
            Definitions
         
               3.
            
            Markings
         
               4.
            
            Application for approval
         
               5.
            
            Approval
         
               6.
            
            Requirements
         
               7.
            
            Modifications of the type of pneumatic tyre and extension of approval
         
               8.
            
            Conformity of production
         
               9.
            
            Penalties for non-conformity of production
         
               10.
            
            Production definitely discontinued
         
               11.
            
            Names and addresses of technical services responsible for conducting approval tests, and of administrative departments
         ANNEXES
   
               Annex 1 —
            
            Communication concerning the approval or extension or refusal or withdraw of approval or production definitely discontinued of a type of pneumatic tyre for motor cycles and mopeds pursuant to Regulation No 75
         
               Annex 2 —
            
            Arrangement of the approval mark
         
               Annex 3 —
            
            Arrangement of tyre markings — Example of the markings to be borne by types of tyres placed on the market after the entry into force of this Regulation
         
               Annex 4 —
            
            Load capacity index/maximum mass correspondence
         
               Annex 5 —
            
            Tyre size designation and dimensions
         
               Annex 6 —
            
            Method of measuring pneumatic tyres
         
               Annex 7 —
            
            Procedure for load/speed performance tests
         
               Annex 8 —
            
            Tyre load capacities at various speeds
         
               Annex 9 —
            
            Test procedure for the dynamic growth of tyres
         1.   SCOPE
   This Regulation applies to new pneumatic tyres for vehicles of category L1, L2, L3, L4 and L5.
   However, it does not apply to tyre types designed exclusively for the ‘off-road’ use, which are marked ‘NHS’ (Not for Highway Service) and to tyre types designed exclusively for competitions.
   2.   DEFINITIONS
   For the purpose of this Regulation:
   
               2.1.
            
            
               ‘Type of pneumatic tyre’ means a category of pneumatic tyres which do not differ in such essential respects as:
               
                           2.1.1.
                        
                        
                           The manufacturer;
                        
                     
                           2.1.2.
                        
                        
                           Tyre size designation;
                        
                     
                           2.1.3.
                        
                        
                           Category of use (normal: for normal highway service; special: for special applications such as on-and off-the-road, snow, moped);
                        
                     
                           2.1.4.
                        
                        
                           Structure (diagonal or bias-ply, bias belted, radial);
                        
                     
                           2.1.5.
                        
                        
                           Speed category;
                        
                     
                           2.1.6.
                        
                        
                           Load capacity index;
                        
                     
                           2.1.7.
                        
                        
                           Tyre cross-section.
                        
                     
         
               2.2.
            
            
               ‘Structure of a pneumatic tyre’ means the technical characteristics of the tyre’s carcass. The following structures of a pneumatic tyre are distinguished in particular:
               
                           2.2.1.
                        
                        
                           ‘Diagonal’ or ‘bias ply’ describes a pneumatic tyre structure in which the ply cords extend to the beads and are laid at alternate angles substantially less than 90° to the centre line of the tread (1).
                        
                     
                           2.2.2.
                        
                        
                           ‘Bias belted’ describes a pneumatic tyre structure of diagonal (bias-ply) type in which the carcass is restricted by a belt comprising two or more layers of substantially inextensible cord material laid at alternate angles close to those of the carcass.
                        
                     
                           2.2.3.
                        
                        
                           ‘Radial’ describes a pneumatic tyre structure in which the ply cords extend to the beads and are laid substantially at 90° to the centreline of the tread, the carcass being stabilised by an essentially inextensible circumferential belt (1).
                        
                     
                           2.2.4.
                        
                        
                           ‘Reinforced’ describes a pneumatic tyre structure in which the carcass is more resistant than that of the corresponding normal tyre.
                        
                     
         
               2.3.
            
            
               ‘Bead’ means the part of a pneumatic tyre which is of such shape and structure as to fit the rim and hold the tyre on it (2).
            
         
               2.4.
            
            
               ‘Cord’ means the strands forming the fabric of the plies in the pneumatic tyre (2).
            
         
               2.5.
            
            
               ‘Ply’ means a layer of rubber-coated parallel cords (2).
            
         
               2.6.
            
            
               ‘Carcass’ means that part of a pneumatic tyre other than the tread and the rubber side walls which, when inflated, bears the load (2).
            
         
               2.7.
            
            
               ‘Tread’ means that part of a pneumatic tyre which comes into contact with the ground, protects the carcass against mechanical damage and contributes to ground adhesion (2).
            
         
               2.8.
            
            
               ‘Side wall’ means the part of a pneumatic tyre between the tread and the area designed to be covered by the rim flange (2).
            
         
               2.9.
            
            
               ‘Tread groove’ means the space between two adjacent ribs or blocks in the tread pattern (2).
            
         
               2.10.
            
            
               ‘Principal groove’ means the wide grooves situated in the central zone of the tread.
            
         
               2.11.
            
            
               ‘Section width (S)’ means the linear distance between the outsides of the side walls of an inflated pneumatic tyre, excluding elevations due to labelling (marking), decoration or protective bands or ribs (2).
            
         
               2.12.
            
            
               ‘Overall width’ means the linear distance between the outsides of the side walls of an inflated pneumatic tyre, including labelling (marking), decoration and protective bands or ribs (2); in the case of tyres where the tread is wider than the section width, the overall width corresponds to the tread width.
            
         
               2.13.
            
            
               ‘Section height (H)’ means a distance equal to half the difference between the outer diameter of the tyre and the nominal rim diameter (2).
            
         
               2.14.
            
            
               ‘Nominal aspect ratio (Ra)’ means the centuple of the number obtained by dividing the number expressing the section height (H) by the number expressing the nominal section width (S1), both dimensions expressed in the same units.
            
         
               2.15.
            
            
               ‘Outer diameter (D)’ means the overall diameter of an inflated new pneumatic tyre (2).
            
         
               2.16.
            
            
               ‘Tyre-size designation’ is a designation showing:
               
                           2.16.1.
                        
                        
                           The nominal section width (S1) must be expressed in mm except in the case of types of tyre for which the size designation is shown in the first column of the tables in Annex 5 to this Regulation;
                        
                     
                           2.16.2.
                        
                        
                           The nominal aspect ratio, except in the case of certain types of tyre, for which the size designation is shown in the first column of the tables in Annex 5 to this Regulation;
                        
                     
                           2.16.3.
                        
                        
                           A conventional number ‘d’ denoting the nominal diameter of the rim and corresponding to its diameter expressed either by code (numbers below 100) or in millimetres’ (numbers above 100).
                           
                                       2.16.3.1.
                                    
                                    
                                       The values in millimetres of the symbol ‘d’ when indicated by a code are as follows:
                                       
                                                   (in mm)
                                                
                                             
                                                   Symbol ‘d’ indicated by one or two figures according to the nominal rim diameter
                                                
                                                
                                                   Value of ‘d’
                                                
                                             
                                                   4
                                                
                                                
                                                   102
                                                
                                             
                                                   5
                                                
                                                
                                                   127
                                                
                                             
                                                   6
                                                
                                                
                                                   152
                                                
                                             
                                                   7
                                                
                                                
                                                   178
                                                
                                             
                                                   8
                                                
                                                
                                                   203
                                                
                                             
                                                   9
                                                
                                                
                                                   229
                                                
                                             
                                                   10
                                                
                                                
                                                   254
                                                
                                             
                                                   11
                                                
                                                
                                                   279
                                                
                                             
                                                   12
                                                
                                                
                                                   305
                                                
                                             
                                                   13
                                                
                                                
                                                   330
                                                
                                             
                                                   14
                                                
                                                
                                                   356
                                                
                                             
                                                   15
                                                
                                                
                                                   381
                                                
                                             
                                                   16
                                                
                                                
                                                   406
                                                
                                             
                                                   17
                                                
                                                
                                                   432
                                                
                                             
                                                   18
                                                
                                                
                                                   457
                                                
                                             
                                                   19
                                                
                                                
                                                   483
                                                
                                             
                                                   20
                                                
                                                
                                                   508
                                                
                                             
                                                   21
                                                
                                                
                                                   533
                                                
                                             
                                                   22
                                                
                                                
                                                   559
                                                
                                             
                                                   23
                                                
                                                
                                                   584
                                                
                                             
                                 
                     
         
               2.17.
            
            
               ‘Nominal rim diameter (d)’ means the diameter of the rim on which a tyre is designed to be mounted (2).
            
         
               2.18.
            
            
               ‘Rim’ means the support for a tyre-and-tube assembly, or for a tubeless tyre, on which the tyre beads are seated (2).
               
                           2.18.1.
                        
                        
                           ‘Tyre to rim fitment configuration’ means the type of rim to which the tyre is designed to be fitted. In the case of non-standard rims this will be identified by a symbol applied to the tyre.
                        
                     
         
               2.19.
            
            
               ‘Theoretical rim’ means the rim whose width would be equal to X times the nominal section width of a tyre. The value of X shall be specified by the manufacturer of the tyre.
            
         
               2.20.
            
            
               ‘Measuring rim’ means the rim on which a tyre is required to be fitted for size measurements.
            
         
               2.21.
            
            
               ‘Test rim’ means the rim on which a tyre is required to be fitted for testing.
            
         
               2.22.
            
            
               ‘Chunking’ means the breaking away of pieces of rubber from the tread.
            
         
               2.23.
            
            
               ‘Cord separation’ means the parting of the cords from their rubber coating.
            
         
               2.24.
            
            
               ‘Ply separation’ means the parting of adjacent plies.
            
         
               2.25.
            
            
               ‘Tread separation’ means the pulling away of the tread from the carcass.
            
         
               2.26.
            
            
               ‘Load capacity index’ means a figure associated with the maximum load a tyre can carry at the speed corresponding to its speed symbol according to the operating conditions specified by the tyre manufacturer. A list of those indices and of the corresponding loads is given in Annex 4 to this Regulation.
            
         
               2.27.
            
            
               ‘Table of tyre load capacities at various speeds’ means the table in Annex 8 which shows, by reference to indices of load capacity and of capacity at nominal speed, load variations of a tyre if used at speeds other than that corresponding to the index of its nominal speed category.
            
         
               2.28.
            
            
               ‘Speed category’ means:
               
                           2.28.1.
                        
                        
                           The speeds, expressed by the speed category symbol as shown in the table in paragraph 2.28.2.
                        
                     
                           2.28.2.
                        
                        
                           The speed categories are as shown in the table below:
                           
                                       (km/h)
                                    
                                 
                                       Speed category symbol
                                    
                                    
                                       Corresponding speed
                                    
                                 
                                       B
                                    
                                    
                                       50
                                    
                                 
                                       F
                                    
                                    
                                       80
                                    
                                 
                                       G
                                    
                                    
                                       90
                                    
                                 
                                       J
                                    
                                    
                                       100
                                    
                                 
                                       K
                                    
                                    
                                       110
                                    
                                 
                                       L
                                    
                                    
                                       120
                                    
                                 
                                       M
                                    
                                    
                                       130
                                    
                                 
                                       N
                                    
                                    
                                       140
                                    
                                 
                                       P
                                    
                                    
                                       150
                                    
                                 
                                       Q
                                    
                                    
                                       160
                                    
                                 
                                       R
                                    
                                    
                                       170
                                    
                                 
                                       S
                                    
                                    
                                       180
                                    
                                 
                                       T
                                    
                                    
                                       190
                                    
                                 
                                       U
                                    
                                    
                                       200
                                    
                                 
                                       H
                                    
                                    
                                       210
                                    
                                 
                                       V
                                    
                                    
                                       240
                                    
                                 
                                       W
                                    
                                    
                                       270
                                    
                                 
                     
                           2.28.3.
                        
                        
                           Tyres suitable for maximum speeds in excess of 240 km/h are identified by means of letter codes ‘V’ or ‘Z’ (see paragraph 2.33.3) placed within the tyre size designation in front of the indications of the structure (see paragraph 3.1.3).
                        
                     
         
               2.29.
            
            
               ‘Snow tyre’ means a tyre whose tread pattern and whose structure are primarily designed to ensure in mud and fresh or melting snow a performance better than that of an ordinary (road-type) tyre. The tread pattern of a snow tyre generally consists of groove (rib) and/or solid-block elements more widely spaced than on an ordinary (road-type) tyre.
            
         
               2.30.
            
            
               ‘MST’ means ‘multiservice tyre’, suitable both on and off road.
            
         
               2.31.
            
            
               ‘Moped tyre’ means a tyre designed for the equipment of mopeds (categories L1 and L2).
            
         
               2.32.
            
            
               ‘Motor cycle tyre’ means a tyre designed primarily for the equipment of motor cycles (categories L3, L4 and L5). However, they may also equip mopeds (categories L1 and L2) and light trailers (category 01).
            
         
               2.33.
            
            
               ‘Maximum load rating’ means the maximum mass the tyre is rated to carry.
               
                           2.33.1.
                        
                        
                           For speeds lower or equal to 130 km/h, the maximum load rating must not exceed the percentage of the value associated with the relevant load capacity index of the tyre as indicated in the table ‘Load capacity variation with speed’ (see paragraph 2.27) with reference to the speed category symbol of the tyre and the speed capability of the vehicle to which the tyre is fitted.
                        
                     
                           2.33.2.
                        
                        
                           For speeds above 130 km/h but not exceeding 210 km/h, the maximum load rating must not exceed the value of the mass associated with the load capacity index of the tyre.
                        
                     
                           2.33.3.
                        
                        
                           For speeds above 210 km/h but not exceeding 270 km/h, the maximum load rating must not exceed the percentage of the mass, associated with the load capacity index of the tyre, indicated in the table below with reference to the speed category symbol of the tyre and the maximum design speed of the vehicle to which the tyre is to be fitted:
                           
                                       Maximum speed km/h (5)
                                       
                                    
                                    
                                       Maximum Load Rating (%)
                                    
                                 
                                       Speed Category Symbol V
                                    
                                    
                                       Speed Category Symbol W (4)
                                       
                                    
                                 
                                       210
                                    
                                    
                                       100
                                    
                                    
                                       100
                                    
                                 
                                       220
                                    
                                    
                                       95
                                    
                                    
                                       100
                                    
                                 
                                       230
                                    
                                    
                                       90
                                    
                                    
                                       100
                                    
                                 
                                       240
                                    
                                    
                                       85
                                    
                                    
                                       100
                                    
                                 
                                       250
                                    
                                    
                                       (80) (3)
                                       
                                    
                                    
                                       95
                                    
                                 
                                       260
                                    
                                    
                                       (75) (3)
                                       
                                    
                                    
                                       85
                                    
                                 
                                       270
                                    
                                    
                                       (70) (3)
                                       
                                    
                                    
                                       75
                                    
                                 
                     
                           2.33.4.
                        
                        
                           For speeds in excess of 270 km/h, the maximum load rating must not exceed the mass specified by the tyre manufacturer with reference to the speed capacity of the tyre.
                           For intermediate speeds between 270 km/h and the maximum speed permitted by the tyre manufacturer, a linear interpolation of the maximum load rating applies.
                        
                     
         3.   MARKINGS
   
               3.1.
            
            
               Pneumatic tyres submitted for approval shall bear on at least one side wall the following markings:
               
                           3.1.1.
                        
                        
                           The trade name or mark;
                        
                     
                           3.1.2.
                        
                        
                           The tyre size designation as defined in paragraph 2.16 of this Regulation;
                        
                     
                           3.1.3.
                        
                        
                           An indication of the structure as follows:
                           
                                       3.1.3.1.
                                    
                                    
                                       On diagonal (bias-ply) tyres, no marking, or the letter ‘D’,
                                    
                                 
                                       3.1.3.2.
                                    
                                    
                                       On bias-belted tyres, the letter ‘B’ placed in front of the rim-diameter marking, and in addition the words ‘BIAS-BELTED’ can be added,
                                    
                                 
                                       3.1.3.3.
                                    
                                    
                                       On radial-ply tyres, the letter ‘R’ placed in front of the rim-diameter marking, and, the word ‘RADIAL’ can be added.
                                    
                                 
                     
                           3.1.4.
                        
                        
                           An indication of the tyre’s speed category by means of the symbol shown in paragraph 2.28.2 above;
                        
                     
                           3.1.5.
                        
                        
                           The load-capacity index as defined in paragraph 2.26 above;
                        
                     
                           3.1.6.
                        
                        
                           The word ‘TUBELESS’ if the tyre is designed for use without an inner tube;
                        
                     
                           3.1.7.
                        
                        
                           The word ‘REINFORCED’ or ‘REINF’ if the tyre is a reinforced tyre;
                        
                     
                           3.1.8.
                        
                        
                           The date of manufacture in the form of a group of four digits, the first two showing the week and the last two the year of manufacture. This marking, may be affixed to one side wall only.
                        
                     
                           3.1.9.
                        
                        
                           The inscription of ‘M + S’ or ‘M.S’ or ‘M & S’ in the case of a snow tyre. The inscription ‘DP’ (I.E. Dual Purpose) is accepted as a permitted alternative.
                        
                     
                           3.1.10.
                        
                        
                           The inscription MST in the case of multiservice tyres.
                        
                     
                           3.1.11.
                        
                        
                           The inscription ‘MOPED’ (or alternatively ‘CYCLOMOTEUR’ or ‘CICLOMOTORE’) in the case of moped tyres.
                        
                     
                           3.1.12.
                        
                        
                           An identification of the tyre to rim fitment configuration, when it differs from the standard configuration, immediately after the rim diameter marking referred to in paragraph 2.16.3 of this Regulation.
                           In the case of tyres intended to be fitted to rims having a diameter equivalent to code 13 (330 mm) or above, this inscription shall be ‘M/C’. This requirement shall not apply to any tyre sizes listed in the tables of Annex 5 to this Regulation.
                        
                     
                           3.1.13.
                        
                        
                           Tyres suitable for speeds above 240 km/h must be marked with the appropriate letter code ‘V’ or ‘Z’, as applicable (see paragraph 2.33.3) in front of the indication of the structure (see paragraph 3.1.3).
                        
                     
                           3.1.14.
                        
                        
                           Tyres suitable for speeds above 240 km/h or (270 km/h respectively) must bear, within parenthesis, the marking of the load capacity index (see paragraph 3.1.5) applicable at a speed of 210 km/h (or 240 km/h respectively) and a reference speed category symbol (see paragraph 3.1.4) as follows:
                           ‘V’ in case of tyres identified with the letter code ‘V’ within the size designation.
                           ‘W’ in case of tyres identified with the letter code ‘Z’ within the size designation.
                        
                     
         
               3.2.
            
            
               Tyres shall provide adequate space for the approval mark, as shown in Annex 2 to this Regulation.
            
         
               3.3.
            
            
               Annex 3 to this Regulation gives an example of the tyre markings.
            
         
               3.4.
            
            
               The markings referred to in paragraph 3.1 and the approval mark prescribed in paragraph 5.4 of this Regulation shall be moulded on, to or into the tyres. They shall be clearly legible.
            
         4.   APPLICATION FOR APPROVAL
   
               4.1.
            
            
               The application for approval of a type of pneumatic tyre shall be submitted by the holder of the trade name or mark or by his duly accredited representative. It shall specify:
               
                           4.1.1.
                        
                        
                           The tyre-size designation as defined in paragraph 2.16 of this Regulation;
                        
                     
                           4.1.2.
                        
                        
                           The trade name or mark;
                        
                     
                           4.1.3.
                        
                        
                           The category of use (normal, special, snow or moped);
                        
                     
                           4.1.4.
                        
                        
                           Structure: diagonal (bias ply), bias belted or radial;
                        
                     
                           4.1.5.
                        
                        
                           The speed category;
                        
                     
                           4.1.6.
                        
                        
                           The load-capacity index of the tyre;
                        
                     
                           4.1.7.
                        
                        
                           Whether the tyre is to be used with or without an inner tube;
                        
                     
                           4.1.8.
                        
                        
                           Whether the tyre is ‘normal’ or ‘reinforced’;
                        
                     
                           4.1.9.
                        
                        
                           The ply-rating number of tyres for motor cycle derivatives (see table 5 of Annex 5 to this Regulation) (6);
                        
                     
                           4.1.10.
                        
                        
                           The overall dimensions: overall section width, and overall diameter;
                        
                     
                           4.1.11.
                        
                        
                           The rims on which the tyre can be mounted;
                        
                     
                           4.1.12.
                        
                        
                           The measuring rim and test rim;
                        
                     
                           4.1.13.
                        
                        
                           The test and measurement pressures;
                        
                     
                           4.1.14.
                        
                        
                           The factor X referred to in paragraph 2.19 above;
                        
                     
                           4.1.15.
                        
                        
                           For tyres identified by means of letter code ‘V’ within the size designation and suitable for speeds over 240 km/h or for tyres identified by means of letter code ‘Z’ within the size designation and suitable for speeds over 270 km/h, the maximum speed permitted by the tyre manufacturer and the load carrying capacity allowed for that maximum speed.
                        
                     
         
               4.2.
            
            
               The application for approval shall be accompanied (all in triplicate) by a sketch, or a representative photograph, which identify the tyre tread pattern and a sketch of the envelope of the inflated tyre mounted on the measuring rim showing the relevant dimensions (see paragraphs 6.1.1 and 6.1.2) of the type submitted for approval. It shall also be accompanied either by the test report issued by the approved test laboratory or by one or two samples of the tyre type, at the discretion of the competent authority. Drawings or photographs of the side wall and tread of the tyre shall be submitted once production has been established, no later than 1 year after the date of issue of the type approval.
            
         
               4.3.
            
            
               Where a tyre manufacturer submits application for type approval for a range of tyres, it is not considered necessary to carry out a load/speed test on every type of tyre in the range. Worst case selection may be made at the discretion of the approval authority.
            
         5.   APPROVAL
   
               5.1.
            
            
               If the pneumatic tyre submitted for approval in pursuance of this Regulation meets the requirements of paragraph 6 below, approval of that type of tyre shall be granted.
            
         
               5.2.
            
            
               An approval number shall be assigned to each type approved. Its first two digits (at present 00 for the Regulation in its original form) shall indicate the series of amendments incorporating the most recent major technical amendments made to the Regulation at the time of issue of the approval. The number so assigned shall not be assigned by the same Contracting Party to another type of pneumatic tyre.
            
         
               5.3.
            
            
               Notice of approval or of extension or of refusal or withdrawal of approval of a type of pneumatic tyre pursuant to this Regulation shall be communicated to the Parties to the Agreement applying this Regulation, by means of a form conforming to the model in Annex 1 to this Regulation.
            
         
               5.3.1.
            
            
               For tyres suitable for speeds above 240 km/h, the maximum speed permitted and the relevant load rating are specified under item 10 of Annex 1.
            
         
               5.4.
            
            
               There shall be affixed conspicuously to every pneumatic tyre conforming to a type of tyre approved under this Regulation, in the space referred to in paragraph 3.2 above, and in addition to the markings prescribed in paragraph 3.1 above, an international approval mark consisting of:
               
                           5.4.1.
                        
                        
                           A circle surrounding the letter ‘E’ followed by the distinguishing number of the country which has granted approval (7);
                        
                     
                           5.4.2.
                        
                        
                           The number of this Regulation, followed by the letter ‘R’, a dash and the type approval number.
                        
                     
         
               5.5.
            
            
               The approval mark shall be clearly legible and be indelible.
            
         
               5.6.
            
            
               Annex 2 to this Regulation gives an example of the arrangement of the approval mark.
            
         6.   REQUIREMENTS
   6.1.   Dimensions of tyres
   6.1.1.   Section width of a tyre
   
               6.1.1.1.
            
            
               The section width is obtained by means of the following formula:
               S = S1 + K (A – A1)
               where:
               
                           S
                        
                        
                           is the ‘section width’ expressed in millimetres and measured on the measuring rim;
                        
                     
                           S1
                           
                        
                        
                           is the ‘nominal section width’ (in millimetres) as shown on the side wall of the tyre in the designation of the tyre as prescribed;
                        
                     
                           A
                        
                        
                           is the width (expressed in millimetres) of the measuring rim, as shown by the manufacturer in the descriptive note;
                        
                     
                           A1
                           
                        
                        
                           is the width (expressed in millimetres) of the theoretical rim;
                        
                     
                           A1
                           
                        
                        
                           shall be taken to equal S1 multiplied by the Factor X specified by the manufacturer;
                        
                     
                           K
                        
                        
                           shall be taken to equal 0,4.
                        
                     
         
               6.1.1.2.
            
            
               However, for types of tyres for which the size designation is shown in the first column of the tables in Annex 5 to this Regulation, the section width shall be allowed to be that given opposite the tyre designation in the tables.
            
         6.1.2.   Outer diameter of a tyre
   
               6.1.2.1.
            
            
               The outer diameter of a tyre is obtained by means of the following formula:
               D = d + 2H
               where:
               
                           D
                        
                        
                           is the outer diameter expressed in millimetres;
                        
                     
                           d
                        
                        
                           is the conventional number defined in paragraph 2.16.3 above expressed in millimetres;
                        
                     
                           H
                        
                        
                           is the nominal section height in millimetres and is equal to:
                           H = S1 × 0,01 Ra
                           where:
                           
                                       S1
                                       
                                    
                                    
                                       is the nominal section width (in millimetres); and
                                    
                                 
                                       Ra
                                    
                                    
                                       is the nominal aspect ratio;
                                    
                                 
                     all as shown on the side wall of the tyre in the tyre designation in conformity with the requirements of paragraph 3.4 above.
            
         
               6.1.2.2.
            
            
               However, for types of tyres for which the size designation is shown in the first column of the tables in Annex 5 to this Regulation, the outer diameter shall be allowed to be that given opposite the tyre designation in the tables.
            
         6.1.3.   Method of measuring pneumatic tyres
   The dimensions of pneumatic tyres shall be measured by the procedure described in Annex 6 to this Regulation.
   6.1.4.   Tyre section-width specifications
   
               6.1.4.1.
            
            
               The overall width of a tyre may be less than the section width S determined pursuant to paragraph 6.1.1 above.
            
         
               6.1.4.2.
            
            
               It may exceed that value up to the value shown in Annex 5 or for sizes not included in Annex 5 by the following percentages:
               
                           6.1.4.2.1.
                        
                        
                           For normal and snow service:
                           
                                       (a)
                                    
                                    
                                       rim diameter code 13 and above: + 10 per cent;
                                    
                                 
                                       (b)
                                    
                                    
                                       rim diameter codes up to 12 inclusive: + 8 per cent.
                                    
                                 
                     
                           6.1.4.2.2.
                        
                        
                           For special service tyres which are suitable for limited road use and are marked MST: 25 per cent.
                        
                     
         6.1.5.   Tyre outer-diameter specifications
   
               6.1.5.1.
            
            
               The outer diameter of a tyre must not be outside the values Dmin and Dmax specified in Annex 5.
            
         
               6.1.5.2.
            
            
               For sizes not listed in Annex 5 the outer diameter of a tyre must not be outside the values Dmin and Dmax obtained from the following formulae:
               
                            
                        
                        
                           Dmin = d + (2H × a)
                        
                     
                            
                        
                        
                           Dmax = d + (2H × b)
                        
                     where:
               H and d are as defined in paragraph 6.1.2.1 and a and b are as specified in paragraphs 6.1.5.2.1 and 6.1.5.2.2 respectively.
               
                           6.1.5.2.1.
                        
                        
                           For normal highway service tyres and snow tyres a
                           
                                       Rim diameter code 13 and above
                                    
                                    
                                       :
                                    
                                    
                                       0,97
                                    
                                 
                                       Rim diameter codes up to 12 inclusive
                                    
                                    
                                       :
                                    
                                    
                                       0,93
                                    
                                 
                                       For special service tyres
                                    
                                    
                                       :
                                    
                                    
                                       1,00;
                                    
                                 
                     
                           6.1.5.2.2.
                        
                        
                           For normal highway service tyres b
                           
                                       Rim diameter code 13 and above
                                    
                                    
                                       :
                                    
                                    
                                       1,07
                                    
                                 
                                       Rim diameter codes up to 12 inclusive
                                    
                                    
                                       :
                                    
                                    
                                       1,10
                                    
                                 
                                       For snow tyres and special service tyres
                                    
                                    
                                       :
                                    
                                    
                                       1,12.
                                    
                                 
                     
         6.2.   Load/speed performance test
   
               6.2.1.
            
            
               The pneumatic tyre shall undergo a load/speed performance test carried out by the procedure described in Annex 7 to this Regulation.
            
         
               6.2.1.1.
            
            
               Where application is made for tyres identified by means of letter code ‘V’ within the size designation and suitable for speeds over 240 km/h or for tyres identified by means of letter code ‘Z’ within the size designation and suitable for speeds over 270 km/h (see paragraph 4.1.15), the above load/speed test is carried out on one tyre at the load and speed conditions marked within parenthesis on the tyre (see paragraph 3.1.14). Another load/speed test must be carried out on a second tyre of the same type at the load and speed conditions, if any, specified as maximum by the tyre manufacturer (see paragraph 4.1.15).
            
         
               6.2.2.
            
            
               A tyre which after undergoing the load/speed test does not exhibit any tread separation, ply separation, cord separation, chunking or broken cords shall be deemed to have passed the test.
            
         
               6.2.3.
            
            
               The outer diameter of the tyre, measured at least 6 hours after the load/speed performance test, must not differ by more than ± 3,5 per cent from the outer diameter as measured before the test.
            
         
               6.2.4.
            
            
               The overall width of the tyre measured at the end of the load/speed performance test must not exceed the value determined in paragraph 6.1.4.2.
            
         6.3.   Dynamic growth of tyres
   The tyres indicated in paragraph 1.1 of Annex 9 to this Regulation, which have passed the test for load/speed performance requirements in accordance with paragraph 6.2 above, shall be submitted to a dynamic growth test to be carried out in accordance with the procedure described in the said Annex.
   7.   MODIFICATIONS OF THE TYPE OF PNEUMATIC TYRE AND EXTENSION OF APPROVAL
   
               7.1.
            
            
               Every modification of the type of pneumatic tyre shall be notified to the administrative department which approved the type of pneumatic tyre. The department may then either:
               
                           7.1.1.
                        
                        
                           Consider that the modifications made are unlikely to have an appreciable adverse effect and that in any case, the pneumatic tyre still complies with the requirements; or
                        
                     
                           7.1.2.
                        
                        
                           Require a further test report from the technical service responsible for conducting the tests.
                        
                     
                           7.1.3.
                        
                        
                           A modification of the tread pattern of a tyre is deemed as not necessitating a repetition of the test specified in paragraph 6.2.
                        
                     
                           7.1.4.
                        
                        
                           Extensions of approval for tyres suitable for speeds over 240 km/h for tyres identified by means of letter code ‘V’ within the size designation (or 270 km/h for tyres identified by means of letter code ‘Z’ within the size designation), aiming at certification for different maximum speeds and/or loads, are permitted provided that a new test report, related to the new maximum speed and load rating, is supplied by the technical service responsible for carrying out tests.
                           Such new load/speed capabilities must be specified in item 9 of Annex 1.
                        
                     
         
               7.2.
            
            
               Confirmation or refusal of approval, specifying the alterations, shall be communicated by the procedure specified in paragraph 5.3 above to the Parties to the Agreement which apply this Regulation.
            
         
               7.3.
            
            
               The competent authority granting the extension of approval shall assign a series number to each communication form drawn up for such an extension.
            
         8.   CONFORMITY OF PRODUCTION
   The conformity of production procedures shall comply with those set out in the Agreement, Appendix 2 (E/ECE/324-E/ECE/TRANS/505/Rev.2), with the following requirements:
   
               8.1.
            
            
               Tyres approved under this Regulation shall be so manufactured as to conform to the type approved, by meeting the requirements set forth in paragraph 6 above.
            
         
               8.2.
            
            
               The authority which has granted type approval may at any time verify the conformity control methods applied in each production facility. For each production facility the normal frequency of these verifications shall be once every 2 years.
            
         9.   PENALTIES FOR NON-CONFORMITY OF PRODUCTION
   
               9.1.
            
            
               The approval granted in respect of a type of pneumatic tyre pursuant to this Regulation may be withdrawn if the requirements laid down in paragraph 8.1 above are not complied with or if the tyres taken from the series have failed to pass the tests prescribed in that paragraph.
            
         
               9.2.
            
            
               If a Party to the Agreement applying this Regulation withdraws an approval it has previously granted, it shall forthwith so notify the other Contracting Parties applying this Regulation by means of a communication form conforming to the model in Annex 1 to this Regulation.
            
         10.   PRODUCTION DEFINITELY DISCONTINUED
   If the holder of an approval completely ceases to manufacture a type of pneumatic tyre approved in accordance with this Regulation, he shall so inform the authority which granted the approval. Upon receiving the relevant communication that authority shall inform thereof the other Parties to the 1958 Agreement applying this Regulation by means of a communication form conforming to the model in Annex 1 to this Regulation.
   11.   NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR APPROVAL TESTS, AND OF ADMINISTRATIVE DEPARTMENTS
   
               11.1.
            
            
               The Parties to the Agreement which apply this Regulation shall communicate to the United Nations Secretariat the names and addresses of the technical services responsible for approval tests and of the administrative departments which grant approval and to which forms certifying approval, or extension, or refusal or withdrawal of approval, issued in other countries, are to be sent.
            
         
               11.2.
            
            
               The Parties to the Agreement which apply this Regulation may use laboratories of tyre manufacturers and may designate, as approved, test laboratories among those which are situated on their territory or on the territory of another Party to the Agreement, subject to a preliminary agreement to the procedure by the competent administrative department of the latter.
            
         
               11.3.
            
            
               Where a Party to the Agreement applies paragraph 11.2 above, it may, if it so desires, be represented at the tests by one or more persons of its choice.
            
         
      (1)  Applicable also to Regulation No 54.
   
      (2)  See the explanatory figure in the Appendix.
   
      (3)  Applicable only to tyres identified by means of letter code ‘V’ within the size designation and up to the maximum speed specified by the tyre manufacturer.
   
      (4)  Applicable also to tyres identified by means of letter code ‘Z’ within the size designation.
   
      (5)  For intermediate speeds linear interpolation of maximum load rating is allowed.
   
      (6)  From the date of entry into force of Supplement 8 to this Regulation no new approvals for these tyres should be issued pursuant to Regulation No 75. These tyre sizes are now included in Regulation No 54.
   
      (7)  1 for Germany, 2 for France, 3 for Italy, 4 for the Netherlands, 5 for Sweden, 6 for Belgium, 7 for Hungary, 8 for the Czech Republic, 9 for Spain, 10 for Serbia, 11 for the United Kingdom, 12 for Austria, 13 for Luxembourg, 14 for Switzerland, 15 (vacant), 16 for Norway, 17 for Finland, 18 for Denmark, 19 for Romania, 20 for Poland, 21 for Portugal, 22 for the Russian Federation, 23 for Greece, 24 for Ireland, 25 for Croatia, 26 for Slovenia, 27 for Slovakia, 28 for Belarus, 29 for Estonia, 30 (vacant), 31 for Bosnia and Herzegovina, 32 for Latvia, 33 (vacant), 34 for Bulgaria, 35 (vacant), 36 for Lithuania, 37 for Turkey, 38 (vacant), 39 for Azerbaijan, 40 for The former Yugoslav Republic of Macedonia, 41 (vacant), 42 for the European Union (Approvals are granted by its Member States using their respective ECE symbol), 43 for Japan, 44 (vacant), 45 for Australia, 46 for Ukraine, 47 for South Africa, 48 for New Zealand, 49 for Cyprus, 50 for Malta, 51 for the Republic of Korea, 52 for Malaysia, 53 for Thailand, 54 and 55 (vacant), 56 for Montenegro, 57 (vacant) and 58 for Tunisia. Subsequent numbers shall be assigned to other countries in the chronological order in which they ratify or accede to the Agreement Concerning the Adoption of Uniform Technical Prescriptions for Wheeled Vehicles, Equipment and Parts which can be Fitted and/or be Used on Wheeled Vehicles and the Conditions for Reciprocal Recognition of Approvals Granted on the Basis of these Prescriptions, and the numbers thus assigned shall be communicated by the Secretary-General of the United Nations to the Contracting Parties to the Agreement.
   
      Appendix
      
         EXPLANATORY FIGURE
      
      (See paragraph 2 of the Regulation)
      
         
   
   
      ANNEX 1
      
         COMMUNICATION
      
      (maximum format: A4 (210 x 297 mm))
      
         
   
   
      ANNEX 2
      
         ARRANGEMENT OF THE APPROVAL MARK
      
      
         
   
   
      ANNEX 3
      
         ARRANGEMENT OF TYRE MARKINGS
      
      Example of the markings to be borne by types of tyres placed on the market after the entry into force of this Regulation
      
         
      These markings define a pneumatic tyre:
      
                  —
               
               
                  Having a nominal section width of 100,
               
            
                  —
               
               
                  Having a nominal aspect ratio of 80,
               
            
                  —
               
               
                  Having a bias-belted structure,
               
            
                  —
               
               
                  Having a nominal rim diameter of 457 mm, for which the code is l8,
               
            
                  —
               
               
                  Having a load capacity of 206 kg, corresponding to load index 53 in Annex 4 to this Regulation,
               
            
                  —
               
               
                  Of speed category S (maximum speed 180 km/h),
               
            
                  —
               
               
                  For fitting without an inner tube (‘tubeless’),
               
            
                  —
               
               
                  Snow tyre manufactured in the 25th week of the year 2003.
               
            The positioning and order of the markings constituting the tyre designation shall be the following:
      
                  (a)
               
               
                  The size designation, comprising the nominal section width, the nominal aspect ratio, the type-of-structure symbol (where applicable) and the nominal rim diameter shall be grouped as shown in the above example: 100/80Bl8;
               
            
                  (b)
               
               
                  The load index and the speed-category symbol shall be placed together near the size designation. They may either follow it or be placed above or below it;
               
            
                  (c)
               
               
                  The markings ‘TUBELESS’ and ‘REINFORCED’ or ‘REINF’ and ‘M + S’ and ‘MST’ and/or ‘MOPED’ (or CYCLOMOTEUR or CICLOMOTORE) may be at a distance from the size designation symbol;
               
            
                  (d)
               
               
                  In case of tyres suitable for speeds above 240 km/h the letter code ‘V’ or ‘Z’ as applicable, must be marked in front of the marking of structure (e.g. 140/60ZR18). The reference load capacity index and speed category symbol must be marked within parenthesis as applicable (see paragraph 3.1.14).
               
            
   
      ANNEX 4
      
         LOAD CAPACITY INDEX/MAXIMUM MASS CORRESPONDENCE
      
      
                  A
               
               
                  =
               
               
                  Load capacity index
               
            
                  B
               
               
                  =
               
               
                  Maximum corresponding mass (kg)
               
            
         
      
                  A
               
               
                  B
               
            
                  16
               
               
                  71
               
            
                  17
               
               
                  73
               
            
                  18
               
               
                  75
               
            
                  19
               
               
                  77,5
               
            
                  20
               
               
                  80
               
            
                  21
               
               
                  82,5
               
            
                  22
               
               
                  85
               
            
                  23
               
               
                  87,5
               
            
                  24
               
               
                  90
               
            
                  25
               
               
                  92,5
               
            
                  26
               
               
                  95
               
            
                  27
               
               
                  97
               
            
                  28
               
               
                  100
               
            
                  29
               
               
                  103
               
            
                  30
               
               
                  106
               
            
                  31
               
               
                  109
               
            
                  32
               
               
                  112
               
            
                  33
               
               
                  115
               
            
                  34
               
               
                  118
               
            
                  35
               
               
                  121
               
            
                  36
               
               
                  125
               
            
                  37
               
               
                  128
               
            
                  38
               
               
                  132
               
            
                  39
               
               
                  136
               
            
                  40
               
               
                  140
               
            
                  41
               
               
                  145
               
            
                  42
               
               
                  150
               
            
                  43
               
               
                  155
               
            
                  44
               
               
                  160
               
            
                  45
               
               
                  165
               
            
                  46
               
               
                  170
               
            
                  47
               
               
                  175
               
            
                  48
               
               
                  180
               
            
                  49
               
               
                  185
               
            
                  50
               
               
                  190
               
            
                  51
               
               
                  195
               
            
                  52
               
               
                  200
               
            
                  53
               
               
                  206
               
            
                  54
               
               
                  212
               
            
                  55
               
               
                  218
               
            
                  56
               
               
                  224
               
            
                  57
               
               
                  230
               
            
                  58
               
               
                  236
               
            
                  59
               
               
                  243
               
            
                  60
               
               
                  250
               
            
                  61
               
               
                  257
               
            
                  62
               
               
                  265
               
            
                  63
               
               
                  272
               
            
                  64
               
               
                  280
               
            
                  65
               
               
                  290
               
            
                  66
               
               
                  300
               
            
                  67
               
               
                  307
               
            
                  68
               
               
                  315
               
            
                  69
               
               
                  325
               
            
                  70
               
               
                  335
               
            
                  71
               
               
                  345
               
            
                  72
               
               
                  355
               
            
                  73
               
               
                  365
               
            
                  74
               
               
                  375
               
            
                  75
               
               
                  387
               
            
                  76
               
               
                  400
               
            
                  77
               
               
                  412
               
            
                  78
               
               
                  425
               
            
                  79
               
               
                  437
               
            
                  80
               
               
                  450
               
            
                  81
               
               
                  462
               
            
                  82
               
               
                  475
               
            
                  83
               
               
                  487
               
            
                  84
               
               
                  500
               
            
                  85
               
               
                  515
               
            
                  86
               
               
                  530
               
            
                  87
               
               
                  545
               
            
                  88
               
               
                  560
               
            
                  89
               
               
                  580
               
            
                  90
               
               
                  600
               
            
   
      ANNEX 5
      
         TYRE SIZE DESIGNATION AND DIMENSIONS
      
      
         Table 1
      
      
         Tyres for motor cycles
      
      Sizes with rim diameter code 12 and below
      
                  Tyre size
               
               
                  Measuring rim width
                  (Code)
               
               
                  Overall diameter
                  (mm)
               
               
                  Section width
                  (mm)
               
               
                  Maximum overall width
                  (mm)
               
            
                   
               
               
                   
               
               
                  D.min
               
               
                  D
               
               
                  D.max
               
               
                   
               
               
                   
               
            
                  2.50 – 8
               
               
                   
               
               
                  328
               
               
                  338
               
               
                  352
               
               
                   
               
               
                   
               
            
                  2.50 – 9
               
               
                   
               
               
                  354
               
               
                  364
               
               
                  378
               
               
                   
               
               
                   
               
            
                  2.50 – 10
               
               
                  1.50
               
               
                  379
               
               
                  389
               
               
                  403
               
               
                  65
               
               
                  70
               
            
                  2.50 – 12
               
               
                   
               
               
                  430
               
               
                  440
               
               
                  451
               
               
                   
               
               
                   
               
            
                  2.75 – 8
               
               
                   
               
               
                  338
               
               
                  348
               
               
                  363
               
               
                   
               
               
                   
               
            
                  2.75 – 9
               
               
                  1.75
               
               
                  364
               
               
                  374
               
               
                  383
               
               
                  71
               
               
                  77
               
            
                  2.75 – 10
               
               
                   
               
               
                  389
               
               
                  399
               
               
                  408
               
               
                   
               
               
                   
               
            
                  2.75 – 12
               
               
                   
               
               
                  440
               
               
                  450
               
               
                  462
               
               
                   
               
               
                   
               
            
                  3.00 – 4
               
               
                   
               
               
                  241
               
               
                  251
               
               
                  264
               
               
                   
               
               
                   
               
            
                  3.00 – 5
               
               
                   
               
               
                  266
               
               
                  276
               
               
                  291
               
               
                   
               
               
                   
               
            
                  3.00 – 6
               
               
                   
               
               
                  291
               
               
                  301
               
               
                  314
               
               
                   
               
               
                   
               
            
                  3.00 – 7
               
               
                   
               
               
                  317
               
               
                  327
               
               
                  342
               
               
                   
               
               
                   
               
            
                  3.00 – 8
               
               
                  2.10
               
               
                  352
               
               
                  362
               
               
                  378
               
               
                  80
               
               
                  86
               
            
                  3.00 – 9
               
               
                   
               
               
                  378
               
               
                  388
               
               
                  401
               
               
                   
               
               
                   
               
            
                  3.00 – 10
               
               
                   
               
               
                  403
               
               
                  413
               
               
                  422
               
               
                   
               
               
                   
               
            
                  3.00 – 12
               
               
                   
               
               
                  454
               
               
                  464
               
               
                  473
               
               
                   
               
               
                   
               
            
                  3.25 – 8
               
               
                   
               
               
                  362
               
               
                  372
               
               
                  386
               
               
                   
               
               
                   
               
            
                  3.25 – 9
               
               
                   
               
               
                  388
               
               
                  398
               
               
                  412
               
               
                   
               
               
                   
               
            
                  3.25 – 10
               
               
                  2.50
               
               
                  414
               
               
                  424
               
               
                  441
               
               
                  88
               
               
                  95
               
            
                  3.25 – 12
               
               
                   
               
               
                  465
               
               
                  475
               
               
                  492
               
               
                   
               
               
                   
               
            
                  3.50 – 4
               
               
                   
               
               
                  264
               
               
                  274
               
               
                  291
               
               
                   
               
               
                   
               
            
                  3.50 – 5
               
               
                   
               
               
                  289
               
               
                  299
               
               
                  316
               
               
                   
               
               
                   
               
            
                  3.50 – 6
               
               
                   
               
               
                  314
               
               
                  324
               
               
                  341
               
               
                   
               
               
                   
               
            
                  3.50 – 7
               
               
                  2.50
               
               
                  340
               
               
                  350
               
               
                  367
               
               
                  92
               
               
                  99
               
            
                  3.50 – 8
               
               
                   
               
               
                  376
               
               
                  386
               
               
                  397
               
               
                   
               
               
                   
               
            
                  3.50 – 9
               
               
                   
               
               
                  402
               
               
                  412
               
               
                  430
               
               
                   
               
               
                   
               
            
                  3.50 – 10
               
               
                   
               
               
                  427
               
               
                  437
               
               
                  448
               
               
                   
               
               
                   
               
            
                  3.50 – 12
               
               
                   
               
               
                  478
               
               
                  488
               
               
                  506
               
               
                   
               
               
                   
               
            
                  4.00 – 5
               
               
                   
               
               
                  314
               
               
                  326
               
               
                  346
               
               
                   
               
               
                   
               
            
                  4.00 – 6
               
               
                   
               
               
                  339
               
               
                  351
               
               
                  368
               
               
                   
               
               
                   
               
            
                  4.00 – 7
               
               
                  2.50
               
               
                  365
               
               
                  377
               
               
                  394
               
               
                  105
               
               
                  113
               
            
                  4.00 – 8
               
               
                   
               
               
                  401
               
               
                  415
               
               
                  427
               
               
                   
               
               
                   
               
            
                  4.00 – 10
               
               
                   
               
               
                  452
               
               
                  466
               
               
                  478
               
               
                   
               
               
                   
               
            
                  4,00 – 12
               
               
                   
               
               
                  505
               
               
                  517
               
               
                  538
               
               
                   
               
               
                   
               
            
                  4.50 – 6
               
               
                   
               
               
                  364
               
               
                  376
               
               
                  398
               
               
                   
               
               
                   
               
            
                  4.50 – 7
               
               
                   
               
               
                  390
               
               
                  402
               
               
                  424
               
               
                   
               
               
                   
               
            
                  4.50 – 8
               
               
                   
               
               
                  430
               
               
                  442
               
               
                  464
               
               
                   
               
               
                   
               
            
                  4.50 – 9
               
               
                  3.00
               
               
                  456
               
               
                  468
               
               
                  490
               
               
                  120
               
               
                  130
               
            
                  4.50 – 10
               
               
                   
               
               
                  481
               
               
                  493
               
               
                  515
               
               
                   
               
               
                   
               
            
                  4.50 – 12
               
               
                   
               
               
                  532
               
               
                  544
               
               
                  568
               
               
                   
               
               
                   
               
            
                  5.00 – 8
               
               
                   
               
               
                  453
               
               
                  465
               
               
                  481
               
               
                   
               
               
                   
               
            
                  5.00 – 10
               
               
                  3.50
               
               
                  504
               
               
                  516
               
               
                  532
               
               
                  134
               
               
                  145
               
            
                  5.00 – 12
               
               
                   
               
               
                  555
               
               
                  567
               
               
                  583
               
               
                   
               
               
                   
               
            
                  6.00 – 6
               
               
                  4.00
               
               
                  424
               
               
                  436
               
               
                  464
               
               
                   
               
               
                   
               
            
                  6.00 – 7
               
               
                   
               
               
                  450
               
               
                  462
               
               
                  490
               
               
                  154
               
               
                  166
               
            
                  6.00 – 8
               
               
                   
               
               
                  494
               
               
                  506
               
               
                  534
               
               
                   
               
               
                   
               
            
                  6,00 – 9
               
               
                   
               
               
                  520
               
               
                  532
               
               
                  562
               
               
                   
               
               
                   
               
            
         
      
         Table 1a
      
      
         Tyres for mopeds
      
      Sizes with rim diameter code 12 and below
      
                  Tyre size
               
               
                  Measuring rim width
                  (Code)
               
               
                  Overall diameter
                  (mm)
               
               
                  Section width
                  (mm)
               
               
                  Maximum overall width
                  (mm) (1)
                  
               
            
                   
               
               
                   
               
               
                  D.min
               
               
                  D
               
               
                  D.max (1)
                  
               
               
                   
               
               
                   
               
            
                  2 – 12
               
               
                  1.35
               
               
                  413
               
               
                  417
               
               
                  426
               
               
                  55
               
               
                  59
               
            
                  2-1/2 – 12
               
               
                  1.50
               
               
                  425
               
               
                  431
               
               
                  441
               
               
                  62
               
               
                  67
               
            
                  2-1/2 – 8
               
               
                  1.75
               
               
                  339
               
               
                  345
               
               
                  356
               
               
                  70
               
               
                  76
               
            
                  2-1/2 – 9
               
               
                  1.75
               
               
                  365
               
               
                  371
               
               
                  382
               
               
                  70
               
               
                  76
               
            
                  2-3/4 – 9
               
               
                  1.75
               
               
                  375
               
               
                  381
               
               
                  393
               
               
                  73
               
               
                  79
               
            
                  3 – 10
               
               
                  2.10
               
               
                  412
               
               
                  418
               
               
                  431
               
               
                  84
               
               
                  91
               
            
                  3 – 12
               
               
                  2.10
               
               
                  463
               
               
                  469
               
               
                  482
               
               
                  84
               
               
                  91
               
            
         
      
         Table 2
      
      
         Tyres for motor cycles
      
      Normal section size
      
                  Tyre size
               
               
                  Measuring rim width
                  (Code)
               
               
                  Overall diameter
                  (mm)
               
               
                  Section width
                  (mm)
               
               
                  Maximum overall width
                  (mm)
               
            
                   
               
               
                   
               
               
                  D.min
               
               
                  D
               
               
                  D.max (2)
                  
               
               
                  D.max (3)
                  
               
               
                   
               
               
                  
                      (2)
                  
               
               
                  
                      (3)
                  
               
            
                  1 3/4 – 19
               
               
                  1.20
               
               
                  582
               
               
                  589
               
               
                  597
               
               
                  605
               
               
                  50
               
               
                  54
               
               
                  58
               
            
                  2 – 14
               
               
                   
               
               
                  461
               
               
                  468
               
               
                  477
               
               
                  484
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 – 15
               
               
                   
               
               
                  486
               
               
                  493
               
               
                  501
               
               
                  509
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 – 16
               
               
                   
               
               
                  511
               
               
                  518
               
               
                  526
               
               
                  534
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 – 17
               
               
                   
               
               
                  537
               
               
                  544
               
               
                  552
               
               
                  560
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 – 18
               
               
                  1.35
               
               
                  562
               
               
                  569
               
               
                  577
               
               
                  585
               
               
                  55
               
               
                  58
               
               
                  63
               
            
                  2 – 19
               
               
                   
               
               
                  588
               
               
                  595
               
               
                  603
               
               
                  611
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 – 20
               
               
                   
               
               
                  613
               
               
                  620
               
               
                  628
               
               
                  636
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 – 21
               
               
                   
               
               
                  638
               
               
                  645
               
               
                  653
               
               
                  661
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 – 22
               
               
                   
               
               
                  663
               
               
                  670
               
               
                  680
               
               
                  686
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 1/4 – 14
               
               
                   
               
               
                  474
               
               
                  482
               
               
                  492
               
               
                  500
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 1/4 – 15
               
               
                   
               
               
                  499
               
               
                  507
               
               
                  517
               
               
                  525
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 1/4 – 16
               
               
                   
               
               
                  524
               
               
                  532
               
               
                  540
               
               
                  550
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 1/4 – 17
               
               
                   
               
               
                  550
               
               
                  558
               
               
                  566
               
               
                  576
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 1/4 – 18
               
               
                  1.50
               
               
                  575
               
               
                  583
               
               
                  591
               
               
                  601
               
               
                  62
               
               
                  66
               
               
                  71
               
            
                  2 1/4 – 19
               
               
                   
               
               
                  601
               
               
                  609
               
               
                  617
               
               
                  627
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 1/4 – 20
               
               
                   
               
               
                  626
               
               
                  634
               
               
                  642
               
               
                  652
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 1/4 – 21
               
               
                   
               
               
                  651
               
               
                  659
               
               
                  667
               
               
                  677
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 1/4 – 22
               
               
                   
               
               
                  677
               
               
                  685
               
               
                  695
               
               
                  703
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 1/2 – 14
               
               
                   
               
               
                  489
               
               
                  498
               
               
                  508
               
               
                  520
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 1/2 – 15
               
               
                   
               
               
                  514
               
               
                  523
               
               
                  533
               
               
                  545
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 1/2 – 16
               
               
                   
               
               
                  539
               
               
                  548
               
               
                  558
               
               
                  570
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 1/2 – 17
               
               
                   
               
               
                  565
               
               
                  574
               
               
                  584
               
               
                  596
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 1/2 – 18
               
               
                  1.60
               
               
                  590
               
               
                  599
               
               
                  609
               
               
                  621
               
               
                  68
               
               
                  72
               
               
                  78
               
            
                  2 1/2 – 19
               
               
                   
               
               
                  616
               
               
                  625
               
               
                  635
               
               
                  647
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 1/2 – 20
               
               
                   
               
               
                  641
               
               
                  650
               
               
                  660
               
               
                  672
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 1/2 – 21
               
               
                   
               
               
                  666
               
               
                  675
               
               
                  685
               
               
                  697
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 1/2 – 22
               
               
                   
               
               
                  692
               
               
                  701
               
               
                  711
               
               
                  723
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 3/4 – 14
               
               
                   
               
               
                  499
               
               
                  508
               
               
                  518
               
               
                  530
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 3/4 – 15
               
               
                   
               
               
                  524
               
               
                  533
               
               
                  545
               
               
                  555
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 3/4 – 16
               
               
                   
               
               
                  549
               
               
                  558
               
               
                  568
               
               
                  580
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 3/4 – 17
               
               
                   
               
               
                  575
               
               
                  584
               
               
                  594
               
               
                  606
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 3/4 – 18
               
               
                  1.85
               
               
                  600
               
               
                  609
               
               
                  621
               
               
                  631
               
               
                  75
               
               
                  80
               
               
                  86
               
            
                  2 3/4 – 19
               
               
                   
               
               
                  626
               
               
                  635
               
               
                  645
               
               
                  657
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 3/4 – 20
               
               
                   
               
               
                  651
               
               
                  660
               
               
                  670
               
               
                  682
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 3/4 – 21
               
               
                   
               
               
                  676
               
               
                  685
               
               
                  695
               
               
                  707
               
               
                   
               
               
                   
               
               
                   
               
            
                  2 3/4 – 22
               
               
                   
               
               
                  702
               
               
                  711
               
               
                  721
               
               
                  733
               
               
                   
               
               
                   
               
               
                   
               
            
                  3 – 16
               
               
                   
               
               
                  560
               
               
                  570
               
               
                  582
               
               
                  594
               
               
                   
               
               
                   
               
               
                   
               
            
                  3 – 17
               
               
                   
               
               
                  586
               
               
                  596
               
               
                  608
               
               
                  620
               
               
                   
               
               
                   
               
               
                   
               
            
                  3 – 18
               
               
                  1.85
               
               
                  611
               
               
                  621
               
               
                  633
               
               
                  645
               
               
                  81
               
               
                  86
               
               
                  93
               
            
                  3 – 19
               
               
                   
               
               
                  637
               
               
                  647
               
               
                  659
               
               
                  671
               
               
                   
               
               
                   
               
               
                   
               
            
                  3 1/4 – 16
               
               
                   
               
               
                  575
               
               
                  586
               
               
                  598
               
               
                  614
               
               
                   
               
               
                   
               
               
                   
               
            
                  3 1/4 – 17
               
               
                   
               
               
                  601
               
               
                  612
               
               
                  624
               
               
                  640
               
               
                   
               
               
                   
               
               
                   
               
            
                  3 1/4 – 18
               
               
                  2.15
               
               
                  626
               
               
                  637
               
               
                  651
               
               
                  665
               
               
                  89
               
               
                  94
               
               
                  102
               
            
                  3 1/4 – 19
               
               
                   
               
               
                  652
               
               
                  663
               
               
                  675
               
               
                  691
               
               
                   
               
               
                   
               
               
                   
               
            
         
      
         Table 3
      
      
         Tyres for motor cycles
      
      Normal section sizes
      
                  Tyre size
               
               
                  Measuring rim width
                  (Code)
               
               
                  Overall diameter
                  (mm)
               
               
                  Section width
                  (mm)
               
               
                  Maximum overall width
                  (mm)
               
            
                   
               
               
                   
               
               
                  D.min
               
               
                  D
               
               
                  D.max (4)
                  
               
               
                  D.max (5)
                  
               
               
                   
               
               
                  
                      (6)
                  
               
               
                  
                      (7)
                  
               
               
                  
                      (8)
                  
               
            
                  2.00 – 14
               
               
                   
               
               
                  460
               
               
                  466
               
               
                  478
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  2.00 – 15
               
               
                   
               
               
                  485
               
               
                  491
               
               
                  503
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  2.00 – 16
               
               
                   
               
               
                  510
               
               
                  516
               
               
                  528
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  2.00 – 17
               
               
                  1.20
               
               
                  536
               
               
                  542
               
               
                  554
               
               
                   
               
               
                  52
               
               
                  57
               
               
                  60
               
               
                  65
               
            
                  2.00 – 18
               
               
                   
               
               
                  561
               
               
                  567
               
               
                  579
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  2.00 – 19
               
               
                   
               
               
                  587
               
               
                  593
               
               
                  605
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  2.25 – 14
               
               
                   
               
               
                  474
               
               
                  480
               
               
                  492
               
               
                  496
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  2.25 – 15
               
               
                   
               
               
                  499
               
               
                  505
               
               
                  517
               
               
                  521
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  2.25 – 16
               
               
                   
               
               
                  524
               
               
                  530
               
               
                  542
               
               
                  546
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  2.25 – 17
               
               
                  1.60
               
               
                  550
               
               
                  556
               
               
                  568
               
               
                  572
               
               
                  61
               
               
                  67
               
               
                  70
               
               
                  75
               
            
                  2.25 – 18
               
               
                   
               
               
                  575
               
               
                  581
               
               
                  593
               
               
                  597
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  2.25 – 19
               
               
                   
               
               
                  601
               
               
                  607
               
               
                  619
               
               
                  623
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  2.50 – 14
               
               
                   
               
               
                  486
               
               
                  492
               
               
                  506
               
               
                  508
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  2.50 – 15
               
               
                   
               
               
                  511
               
               
                  517
               
               
                  531
               
               
                  533
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  2.50 – 16
               
               
                   
               
               
                  536
               
               
                  542
               
               
                  556
               
               
                  558
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  2.50 – 17
               
               
                  1.60
               
               
                  562
               
               
                  568
               
               
                  582
               
               
                  584
               
               
                  65
               
               
                  72
               
               
                  75
               
               
                  79
               
            
                  2.50 – 18
               
               
                   
               
               
                  587
               
               
                  593
               
               
                  607
               
               
                  609
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  2.50 – 19
               
               
                   
               
               
                  613
               
               
                  619
               
               
                  633
               
               
                  635
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  2.50 – 21
               
               
                   
               
               
                  663
               
               
                  669
               
               
                  683
               
               
                  685
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  2.75 – 14
               
               
                   
               
               
                  505
               
               
                  512
               
               
                  524
               
               
                  530
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  2.75 – 15
               
               
                   
               
               
                  530
               
               
                  537
               
               
                  549
               
               
                  555
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  2.75 – 16
               
               
                   
               
               
                  555
               
               
                  562
               
               
                  574
               
               
                  580
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  2.75 – 17
               
               
                  1.85
               
               
                  581
               
               
                  588
               
               
                  600
               
               
                  606
               
               
                  75
               
               
                  83
               
               
                  86
               
               
                  91
               
            
                  2.75 – 18
               
               
                   
               
               
                  606
               
               
                  613
               
               
                  625
               
               
                  631
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  2.75 – 19
               
               
                   
               
               
                  632
               
               
                  639
               
               
                  651
               
               
                  657
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  2.75 – 21
               
               
                   
               
               
                  682
               
               
                  689
               
               
                  701
               
               
                  707
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  3.00 – 14
               
               
                   
               
               
                  519
               
               
                  526
               
               
                  540
               
               
                  546
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  3.00 – 15
               
               
                   
               
               
                  546
               
               
                  551
               
               
                  565
               
               
                  571
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  3.00 – 16
               
               
                   
               
               
                  569
               
               
                  576
               
               
                  590
               
               
                  596
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  3.00 – 17
               
               
                  1.85
               
               
                  595
               
               
                  602
               
               
                  616
               
               
                  622
               
               
                  80
               
               
                  88
               
               
                  92
               
               
                  97
               
            
                  3.00 – 18
               
               
                   
               
               
                  618
               
               
                  627
               
               
                  641
               
               
                  647
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  3.00 – 19
               
               
                   
               
               
                  644
               
               
                  653
               
               
                  667
               
               
                  673
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  3.00 – 21
               
               
                   
               
               
                  694
               
               
                  703
               
               
                  717
               
               
                  723
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  3.00 – 23
               
               
                   
               
               
                  747
               
               
                  754
               
               
                  768
               
               
                  774
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  3.25 – 14
               
               
                   
               
               
                  531
               
               
                  538
               
               
                  552
               
               
                  560
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  3.25 – 15
               
               
                   
               
               
                  556
               
               
                  563
               
               
                  577
               
               
                  585
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  3.25 – 16
               
               
                   
               
               
                  581
               
               
                  588
               
               
                  602
               
               
                  610
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  3.25 – 17
               
               
                  2.15
               
               
                  607
               
               
                  614
               
               
                  628
               
               
                  636
               
               
                  89
               
               
                  98
               
               
                  102
               
               
                  108
               
            
                  3.25 – 18
               
               
                   
               
               
                  630
               
               
                  639
               
               
                  653
               
               
                  661
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  3.25 – 19
               
               
                   
               
               
                  656
               
               
                  665
               
               
                  679
               
               
                  687
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  3.25 – 21
               
               
                   
               
               
                  708
               
               
                  715
               
               
                  729
               
               
                  737
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  3.50 – 14
               
               
                   
               
               
                  539
               
               
                  548
               
               
                  564
               
               
                  572
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  3.50 – 15
               
               
                   
               
               
                  564
               
               
                  573
               
               
                  589
               
               
                  597
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  3.50 – 16
               
               
                   
               
               
                  591
               
               
                  598
               
               
                  614
               
               
                  622
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  3.50 – 17
               
               
                  2.15
               
               
                  617
               
               
                  624
               
               
                  640
               
               
                  648
               
               
                  93
               
               
                  102
               
               
                  107
               
               
                  113
               
            
                  3.50 – 18
               
               
                   
               
               
                  640
               
               
                  649
               
               
                  665
               
               
                  673
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  3.50 – 19
               
               
                   
               
               
                  666
               
               
                  675
               
               
                  691
               
               
                  699
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  3.50 – 21
               
               
                   
               
               
                  716
               
               
                  725
               
               
                  741
               
               
                  749
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  3.75 – 16
               
               
                   
               
               
                  601
               
               
                  610
               
               
                  626
               
               
                  634
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  3.75 – 17
               
               
                   
               
               
                  627
               
               
                  636
               
               
                  652
               
               
                  660
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  3.75 – 18
               
               
                  2.15
               
               
                  652
               
               
                  661
               
               
                  677
               
               
                  685
               
               
                  99
               
               
                  109
               
               
                  114
               
               
                  121
               
            
                  3.75 – 19
               
               
                   
               
               
                  678
               
               
                  687
               
               
                  703
               
               
                  711
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  4.00 – 16
               
               
                   
               
               
                  611
               
               
                  620
               
               
                  638
               
               
                  646
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  4.00 – 17
               
               
                   
               
               
                  637
               
               
                  646
               
               
                  664
               
               
                  672
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  4.00 – 18
               
               
                  2.50
               
               
                  662
               
               
                  671
               
               
                  689
               
               
                  697
               
               
                  108
               
               
                  119
               
               
                  124
               
               
                  130
               
            
                  4.00 – 19
               
               
                   
               
               
                  688
               
               
                  697
               
               
                  715
               
               
                  723
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  4.25 – 16
               
               
                   
               
               
                  623
               
               
                  632
               
               
                  650
               
               
                  660
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  4.25 – 17
               
               
                   
               
               
                  649
               
               
                  658
               
               
                  676
               
               
                  686
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  4.25 – 18
               
               
                  2.50
               
               
                  674
               
               
                  683
               
               
                  701
               
               
                  711
               
               
                  112
               
               
                  123
               
               
                  129
               
               
                  137
               
            
                  4.25 – 19
               
               
                   
               
               
                  700
               
               
                  709
               
               
                  727
               
               
                  737
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  4.50 – 16
               
               
                   
               
               
                  631
               
               
                  640
               
               
                  658
               
               
                  668
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  4.50 – 17
               
               
                   
               
               
                  657
               
               
                  666
               
               
                  684
               
               
                  694
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  4.50 – 18
               
               
                  2.75
               
               
                  684
               
               
                  691
               
               
                  709
               
               
                  719
               
               
                  123
               
               
                  135
               
               
                  141
               
               
                  142
               
            
                  4.50 – 19
               
               
                   
               
               
                  707
               
               
                  717
               
               
                  734
               
               
                  745
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  5.00 – 16
               
               
                   
               
               
                  657
               
               
                  666
               
               
                  686
               
               
                  698
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  5.00 – 17
               
               
                   
               
               
                  683
               
               
                  692
               
               
                  710
               
               
                  724
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  5.00 – 18
               
               
                  3.00
               
               
                  708
               
               
                  717
               
               
                  735
               
               
                  749
               
               
                  129
               
               
                  142
               
               
                  148
               
               
                  157
               
            
                  5.00 – 19
               
               
                   
               
               
                  734
               
               
                  743
               
               
                  761
               
               
                  775
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
         
      
         Table 4
      
      
         Tyres for motor cycles
      
      Low section sizes
      
                  Tyre size
               
               
                  Measuring rim width
                  (Code)
               
               
                  Overall diameter
                  (mm)
               
               
                  Section width
                  (mm)
               
               
                  Maximum overall width
                  (mm)
               
            
                   
               
               
                   
               
               
                  D.min
               
               
                  D
               
               
                  D.max (9)
                  
               
               
                  D.max (10)
                  
               
               
                   
               
               
                  
                      (11)
                  
               
               
                  
                      (12)
                  
               
               
                  
                      (13)
                  
               
            
                  3.60 – 18
               
               
                   
               
               
                  605
               
               
                  615
               
               
                  628
               
               
                  633
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                   
               
               
                  2.15
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
               
                  93
               
               
                  102
               
               
                  108
               
               
                  113
               
            
                  3.60 – 19
               
               
                   
               
               
                  631
               
               
                  641
               
               
                  653
               
               
                  658
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  4.10 – 18
               
               
                   
               
               
                  629
               
               
                  641
               
               
                  654
               
               
                  663
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                   
               
               
                  2.50
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
               
                  108
               
               
                  119
               
               
                  124
               
               
                  130
               
            
                  4.10 – 19
               
               
                   
               
               
                  655
               
               
                  667
               
               
                  679
               
               
                  688
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  5.10 – 16
               
               
                   
               
               
                  615
               
               
                  625
               
               
                  643
               
               
                  651
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  5.10 – 17
               
               
                  3.00
               
               
                  641
               
               
                  651
               
               
                  670
               
               
                  677
               
               
                  129
               
               
                  142
               
               
                  150
               
               
                  157
               
            
                  5.10 – 18
               
               
                   
               
               
                  666
               
               
                  676
               
               
                  694
               
               
                  702
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  4.25/85 – 18
               
               
                  2.50
               
               
                  649
               
               
                  659
               
               
                  673
               
               
                  683
               
               
                  112
               
               
                  123
               
               
                  129
               
               
                  137
               
            
                  4.60 – 16
               
               
                   
               
               
                  594
               
               
                  604
               
               
                  619
               
               
                  628
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  4.60 – 17
               
               
                  2.75
               
               
                  619
               
               
                  630
               
               
                  642
               
               
                  654
               
               
                  117
               
               
                  129
               
               
                  136
               
               
                  142
               
            
                  4.60 – 18
               
               
                   
               
               
                  644
               
               
                  654
               
               
                  670
               
               
                  678
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
            
                  6.10 – 16
               
               
                  4.00
               
               
                  646
               
               
                  658
               
               
                  678
               
               
                  688
               
               
                  168
               
               
                  185
               
               
                  195
               
               
                  203
               
            
         
      
         Table 5
      
      
         Tyres for motor cycle derivatives
          (14)
      
      
                  Tyre size
               
               
                  Measuring rim width
                  (Code)
               
               
                  Overall diameter
                  (mm)
               
               
                  Section width
                  (mm)
               
               
                  Maximum overall width
                  (mm)
               
            
                   
               
               
                   
               
               
                  D.min
               
               
                  D
               
               
                  D.max
               
               
                   
               
               
                   
               
            
                  3.00 – 8C
               
               
                   
               
               
                  359
               
               
                  369
               
               
                  379
               
               
                   
               
               
                   
               
            
                  3.00 – 10C
               
               
                  2.10
               
               
                  410
               
               
                  420
               
               
                  430
               
               
                  80
               
               
                  86
               
            
                  3.00 – 12C
               
               
                   
               
               
                  459
               
               
                  471
               
               
                  479
               
               
                   
               
               
                   
               
            
                  3.50 – 8C
               
               
                   
               
               
                  376
               
               
                  386
               
               
                  401
               
               
                   
               
               
                   
               
            
                  3.50 – 10C
               
               
                  2.50
               
               
                  427
               
               
                  437
               
               
                  452
               
               
                  92
               
               
                  99
               
            
                  3.50 – 12C
               
               
                   
               
               
                  478
               
               
                  488
               
               
                  503
               
               
                   
               
               
                   
               
            
                  4.00 – 8C
               
               
                   
               
               
                  405
               
               
                  415
               
               
                  427
               
               
                   
               
               
                   
               
            
                  4.00 – 10C
               
               
                  3.00
               
               
                  456
               
               
                  466
               
               
                  478
               
               
                  108
               
               
                  117
               
            
                  4.00 – 12C
               
               
                   
               
               
                  507
               
               
                  517
               
               
                  529
               
               
                   
               
               
                   
               
            
                  4.50 – 8C
               
               
                   
               
               
                  429
               
               
                  439
               
               
                  453
               
               
                   
               
               
                   
               
            
                  4.50 – 10C
               
               
                  3.50
               
               
                  480
               
               
                  490
               
               
                  504
               
               
                  125
               
               
                  135
               
            
                  4.50 – 12C
               
               
                   
               
               
                  531
               
               
                  541
               
               
                  555
               
               
                   
               
               
                   
               
            
                  5.00 – 8C
               
               
                   
               
               
                  455
               
               
                  465
               
               
                  481
               
               
                   
               
               
                   
               
            
                  5.00 – 10C
               
               
                  3.50
               
               
                  506
               
               
                  516
               
               
                  532
               
               
                  134
               
               
                  145
               
            
                  5.00 – 12C
               
               
                   
               
               
                  555
               
               
                  567
               
               
                  581
               
               
                   
               
               
                   
               
            
         
      
         Table 6
      
      
         Motor cycle tyres
      
      Low pressure sizes
      
                  Tyre size
               
               
                  Measuring rim width
                  (Code)
               
               
                  Overall diameter
                  (mm)
               
               
                  Section width
                  (mm)
               
               
                  Maximum overall width
                  (mm)
               
            
                   
               
               
                   
               
               
                  D.min
               
               
                  D
               
               
                  D.max
               
               
                   
               
               
                   
               
            
                  5.4 – 10
               
               
                   
               
               
                  474
               
               
                  481
               
               
                  487
               
               
                   
               
               
                   
               
            
                  5.4 – 12
               
               
                   
               
               
                  525
               
               
                  532
               
               
                  547
               
               
                   
               
               
                   
               
            
                  5.4 – 14
               
               
                  4.00
               
               
                  575
               
               
                  582
               
               
                  598
               
               
                  135
               
               
                  143
               
            
                  5.4 – 16
               
               
                   
               
               
                  626
               
               
                  633
               
               
                  649
               
               
                   
               
               
                   
               
            
                  6.7 – 10
               
               
                   
               
               
                  532
               
               
                  541
               
               
                  561
               
               
                   
               
               
                   
               
            
                  6.7 – 12
               
               
                  5.00
               
               
                  583
               
               
                  592
               
               
                  612
               
               
                  170
               
               
                  180
               
            
                  6.7 – 14
               
               
                   
               
               
                  633
               
               
                  642
               
               
                  662
               
               
                   
               
               
                   
               
            
         
      
         Table 7
      
      
         Motor cycle tyres
      
      Sizes and dimensions of American tyres
      
                  Tyre size
               
               
                  Measuring rim width
                  (Code)
               
               
                  Overall diameter
                  (mm)
               
               
                  Section width
                  (mm)
               
               
                  Maximum overall width
                  (mm)
               
            
                   
               
               
                   
               
               
                  D.min
               
               
                  D
               
               
                  D.max
               
               
                   
               
               
                   
               
            
                  MH90 – 21
               
               
                  1.85
               
               
                  682
               
               
                  686
               
               
                  700
               
               
                  80
               
               
                  89
               
            
                  MJ90 – 18
               
               
                  2.15
               
               
                  620
               
               
                  625
               
               
                  640
               
               
                   
               
               
                   
               
            
                   
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
               
                  89
               
               
                  99
               
            
                  MJ90 – 19
               
               
                  2.15
               
               
                  645
               
               
                  650
               
               
                  665
               
               
                   
               
               
                   
               
            
                  ML90 – 18
               
               
                  2.15
               
               
                  629
               
               
                  634
               
               
                  650
               
               
                   
               
               
                   
               
            
                   
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
               
                  93
               
               
                  103
               
            
                  ML90 – 19
               
               
                  2.15
               
               
                  654
               
               
                  659
               
               
                  675
               
               
                   
               
               
                   
               
            
                  MM90 – 19
               
               
                  2.15
               
               
                  663
               
               
                  669
               
               
                  685
               
               
                  95
               
               
                  106
               
            
                  MN90 – 18
               
               
                  2.15
               
               
                  656
               
               
                  662
               
               
                  681
               
               
                  104
               
               
                  116
               
            
                  MP90 – 18
               
               
                  2.15
               
               
                  667
               
               
                  673
               
               
                  692
               
               
                  108
               
               
                  120
               
            
                  MR90 – 18
               
               
                  2.15
               
               
                  680
               
               
                  687
               
               
                  708
               
               
                  114
               
               
                  127
               
            
                  MS90 – 17
               
               
                  2.50
               
               
                  660
               
               
                  667
               
               
                  688
               
               
                  121
               
               
                  134
               
            
                  MT90 – 16
               
               
                  3.00
               
               
                  642
               
               
                  650
               
               
                  672
               
               
                   
               
               
                   
               
            
                   
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
               
                  130
               
               
                  144
               
            
                  MT90 – 17
               
               
                  3.00
               
               
                  668
               
               
                  675
               
               
                  697
               
               
                   
               
               
                   
               
            
                  MU90 – 15M/C
               
               
                  3.50
               
               
                  634
               
               
                  642
               
               
                  665
               
               
                   
               
               
                   
               
            
                   
               
               
                   
               
               
                   
               
               
                   
               
               
                   
               
               
                  142
               
               
                  158
               
            
                  MU90 – 16
               
               
                  3.50
               
               
                  659
               
               
                  667
               
               
                  690
               
               
                   
               
               
                   
               
            
                  MV90 – 15M/C
               
               
                  3.50
               
               
                  643
               
               
                  651
               
               
                  675
               
               
                  150
               
               
                  172
               
            
                  MP85 – 18
               
               
                  2.15
               
               
                  654
               
               
                  660
               
               
                  679
               
               
                  108
               
               
                  120
               
            
                  MR85 – 16
               
               
                  2.15
               
               
                  617
               
               
                  623
               
               
                  643
               
               
                  114
               
               
                  127
               
            
                  MS85 – 18
               
               
                  2.50
               
               
                  675
               
               
                  682
               
               
                  702
               
               
                  121
               
               
                  134
               
            
                  MT85 – 18
               
               
                  3.00
               
               
                  681
               
               
                  688
               
               
                  709
               
               
                  130
               
               
                  144
               
            
                  MU85 – 16M/C
               
               
                  3.50
               
               
                  650
               
               
                  658
               
               
                  681
               
               
                  142
               
               
                  158
               
            
                  MV85 – 15M/C
               
               
                  3.50
               
               
                  627
               
               
                  635
               
               
                  658
               
               
                  150
               
               
                  172
               
            
         (1)  Normal road (highway) service.
      
         (2)  Normal highway service.
      
         (3)  Special service and snow tyres.
      
         (4)  Tyres for normal highway service.
      
         (5)  Tyres for special service and snow tyres.
      
         (6)  Tyres for normal highway service up to speed category P inclusive.
      
         (7)  Tyres for normal highway service above speed category P and snow tyres.
      
         (8)  Tyres for special service.
      
         (9)  Tyres for normal highway service.
      
         (10)  Tyres for special service and snow tyres.
      
         (11)  Tyres for normal highway service up to speed category P inclusive.
      
         (12)  Tyres for normal highway service above speed category P and snow tyres.
      
         (13)  Tyres for special service.
      
         (14)  From the date of entry into force of Supplement 8 to this Regulation no new approvals for these tyres should be issued pursuant to Regulation No 75. These tyre sizes are now included in Regulation No 54, Annex 5, Part I, Table A.
   
   
      ANNEX 6
      
         METHOD OF MEASURING PNEUMATIC TYRES
      
      
                  1.
               
               
                  The tyre is mounted on the measuring rim specified by the manufacturer pursuant to paragraph 4.1.12 of this Regulation and is inflated to a pressure specified by the manufacturer.
                  As an alternative, inflation pressures could be specified as follows:
                  
                              Tyre version
                           
                           
                              Speed category
                           
                           
                              Pressure
                           
                        
                               
                           
                           
                               
                           
                           
                              bar
                           
                           
                              kPa
                           
                        
                              Standard
                           
                           
                              F, G, J, K, L, M, N, P, Q, R, S
                           
                           
                              2,25
                           
                           
                              225
                           
                        
                              T, U, H, V, W
                           
                           
                              2,80
                           
                           
                              280
                           
                        
                              Reinforced
                           
                           
                              F to P
                           
                           
                               
                           
                           
                               
                           
                        
                               
                           
                           
                              Q, R, S, T, U, H, V
                           
                           
                              3,30
                           
                           
                              330
                           
                        
                              Motorcycle Derivatives (1)
                              
                           
                           
                              4PR
                           
                           
                              F to M
                           
                           
                              3,50
                           
                           
                              350
                           
                        
                               
                           
                           
                              6PR
                           
                           
                              4,00
                           
                           
                              400
                           
                        
                               
                           
                           
                              8PR
                           
                           
                              4,50
                           
                           
                              450
                           
                        
                              Moped
                           
                           
                              Standard
                           
                           
                              B
                           
                           
                              2,25
                           
                           
                              225
                           
                        
                              Reinforced
                           
                           
                              B
                           
                           
                              2,80
                           
                           
                              280
                           
                        For other tyre versions, inflate to the pressure specified by the tyre manufacturer.
               
            
                  2.
               
               
                  The tyre fitted on its rim is conditioned to the ambient temperature of the laboratory for at least 24 hours.
               
            
                  3.
               
               
                  The pressure is readjusted to the value specified in paragraph 1 above.
               
            
                  4.
               
               
                  The overall width is measured by calliper at six equally-spaced points, account being taken of the thickness of the protective ribs or bands. The highest measurement so obtained is taken as the overall width.
               
            
                  5.
               
               
                  The outer diameter is determined by measuring the maximum circumference and dividing the figure so obtained by π (3,1416).
               
            
         (1)  From the date of entry into force of Supplement 8 to this Regulation no new approvals for these tyres should be issued pursuant to Regulation No 75. These tyre sizes are now included in Regulation No 54.
   
   
      ANNEX 7
      
         PROCEDURE FOR LOAD/SPEED PERFORMANCE TESTS
      
      1.   PREPARATION OF TYRE
      
                  1.1.
               
               
                  Mount a new tyre on the test rim specified by the manufacturer pursuant to paragraph 4.1.12 of this Regulation.
               
            
                  1.2.
               
               
                  Inflate the tyre to the appropriate pressure given in the following table:
                  
                              Testing inflation pressure (bars)
                           
                        
                              Tyre size
                           
                           
                              Speed Category
                           
                           
                              Inflation pressure
                           
                        
                              bar
                           
                           
                              kPa
                           
                        
                              Standard
                           
                           
                              F, G, J, K
                           
                           
                              2,50
                           
                           
                              250
                           
                        
                              L, M, N, P
                           
                           
                              2,50
                           
                           
                              250
                           
                        
                              Q, R, S
                           
                           
                              3,00
                           
                           
                              300
                           
                        
                              T, U, H, V
                           
                           
                              3,50
                           
                           
                              350
                           
                        
                              Reinforced
                           
                           
                              F, G, J, K, L, M, N, P
                           
                           
                              3,30
                           
                           
                              330
                           
                        
                              Q, R, S, T, U, H, V
                           
                           
                              3,90
                           
                           
                              390
                           
                        
                              Motorcycle Derivatives (1)
                              
                           
                           
                              4PR
                           
                           
                              F, G, J, K, L, M
                           
                           
                              3,70
                           
                           
                              370
                           
                        
                              6PR
                           
                           
                              4,50
                           
                           
                              450
                           
                        
                              8PR
                           
                           
                              5,20
                           
                           
                              520
                           
                        
                              Moped
                           
                           
                              Standard
                           
                           
                              B
                           
                           
                              2,50
                           
                           
                              250
                           
                        
                              Reinforced
                           
                           
                              B
                           
                           
                              3,00
                           
                           
                              300
                           
                        For speeds above 240 km/h, the test pressure is 3,20 bar (320 kPa).
                  For other types of tyre, inflate to the pressure specified by the manufacturer.
               
            
                  1.3.
               
               
                  The manufacturer may request, giving reasons, the use of test-inflation pressures differing from those given under paragraph 1.2 above. In such a case the tyre shall be inflated to that pressure.
               
            
                  1.4.
               
               
                  Condition the tyre-and-wheel assembly at test room temperature for not less than 3 hours.
               
            
                  1.5.
               
               
                  Readjust the tyre pressure to that specified in paragraph 1.2 or 1.3 above.
               
            2.   TEST PROCEDURE
      
                  2.1.
               
               
                  Mount the tyre-and-wheel assembly on the test axle and press it against the outer face of a smooth test drum of 1,70 m ± 1 per cent or 2,0 m ± 1 per cent in diameter.
               
            
                  2.2.
               
               
                  Apply to the test axle a load equal to 65 per cent of:
                  
                              2.2.1.
                           
                           
                              The maximum load rating equated to the Load Capacity Index for tyres with speed symbols up to H inclusive;
                           
                        
                              2.2.2.
                           
                           
                              The maximum load rating associated with a maximum speed of 240 km/h for tyres with speed symbol ‘V’ (see paragraph 2.33.3 of this Regulation);
                           
                        
                              2.2.3.
                           
                           
                              The maximum load rating associated with a maximum speed of 270 km/h for tyres with speed symbol ‘W’ (see paragraph 2.33.3);
                           
                        
                              2.2.4.
                           
                           
                              The maximum load rating associated with the maximum speed specified by the tyre manufacturer for tyres suitable for speeds above 240 km/h (or 270 km/h as applicable) (see paragraph 6.2.1.1).
                           
                        
                              2.2.5.
                           
                           
                              In case of moped tyres (speed category symbol B) the test load is 65 per cent on a 1,7 m diameter test drum and 67 per cent on a 2,0 m diameter test drum.
                           
                        
            
                  2.3.
               
               
                  The tyre pressure must not be corrected throughout the test and the test load must be kept constant.
               
            
                  2.4.
               
               
                  During the test the temperature in the test room must be maintained between 20 °C and 30 °C or at a higher temperature if the manufacturer so agrees.
               
            
                  2.5.
               
               
                  The test shall be run without interruption, in accordance with the following:
                  
                              2.5.1.
                           
                           
                              Twenty minutes is allowed to build up from zero to the initial test speed;
                           
                        
                              2.5.2.
                           
                           
                              Initial tests speed: 30 km/h less than the speed corresponding to the speed category symbol marked on the tyre (see paragraph 2.28.2 of this Regulation) if a 2,0 m diameter test drum is used, or 40 km/h less if a 1,7 m diameter test drum is used;
                              
                                          2.5.2.1.
                                       
                                       
                                          The maximum speed to be considered for the second test in case of tyres suitable for speeds above 240 km/h for tyres identified by means of letter code ‘V’ within the size designation (or 270 km/h for tyres identified by means of letter code ‘Z’ within the size designation) is the maximum speed specified by the tyre manufacturer (see paragraph 4.1.15).
                                       
                                    
                        
                              2.5.3.
                           
                           
                              Speed steps of 10 km/h;
                           
                        
                              2.5.4.
                           
                           
                              Test duration at each speed step: 10 minutes;
                           
                        
                              2.5.5.
                           
                           
                              Total duration of the test: 1 hour;
                           
                        
                              2.5.6.
                           
                           
                              Maximum test speed: the maximum rated speed of the type of tyre if the test is performed with a 2,0 m diameter test drum; maximum rated speed for the type of tyre less 10 km/h if the test is performed with a 1,7 m diameter test drum.
                           
                        
                              2.5.7.
                           
                           
                              In case of moped tyres (speed category symbol B), the test speed is 50 km/h, the build-up from 0 to 50 km/h is 10 minutes, the duration at the speed step is 30 minutes with a total duration of the test of 40 minutes.
                           
                        
            
                  2.6.
               
               
                  However, in case a second test is performed to assess the top performances of tyres suitable for speed above 240 km/h, the procedure shall be the following:
                  
                              2.6.1.
                           
                           
                              Twenty minutes to build up from zero to the initial test speed;
                           
                        
                              2.6.2.
                           
                           
                              Twenty minutes at the initial test speed;
                           
                        
                              2.6.3.
                           
                           
                              Ten minutes to build up to the maximum test speed;
                           
                        
                              2.6.4.
                           
                           
                              Five minutes at the maximum test speed.
                           
                        
            3.   EQUIVALENT TESTS
      If a test other than that described above is used, its equivalence must be proved.
      
         (1)  From the date of entry into force of Supplement 8 to this Regulation no new approvals for these tyres should be issued pursuant to Regulation No 75. These tyre sizes are now included in Regulation No 54.
   
   
      ANNEX 8
      
         TYRE LOAD CAPACITIES AT VARIOUS SPEEDS
      
      
         
   
   
      ANNEX 9
      
         TEST PROCEDURE FOR THE DYNAMIC GROWTH OF TYRES
      
      1.   SCOPE AND RANGE OF APPLICATION
      1.1.   This testing procedure is applicable for tyres mentioned in paragraphs 3.4.1 and 4.1 below.
      1.2.   It serves to determine the maximum tyre growth under the influence of centrifugal forces at the admissible maximum speed.
      2.   DESCRIPTION OF TEST PROCEDURE
      2.1.   The test axle and the rim must be controlled in order to assure a radial run-out less than ± 0,5 mm and a lateral run-out less than ± 0,5 mm, when measured at the bead seat of the wheel.
      2.2.   Contour outline device
      Any device (projecting grid, camera, spot lights and others) which permits the external contour of the tyre cross-section to be outlined distinctly, or to establish an enveloping curve, normal to the tyre equator, at the point of the maximum deformation of the tread.
      The device should reduce to a minimum any distortion and assure a constant (known) ratio (K) between the plotted contour and the actual tyre dimensions.
      The device shall permit reference of the tyre contour to the wheel axis.
      2.3.   The deviation of the tyre tread peripheral speed, measured with a stroboscope, from the corresponding maximum speed of the tyre may not exceed ± 2 per cent.
      2.4.   If another test procedure is applied, it must be proved to be equivalent to the present procedure.
      3.   EXECUTION OF TEST
      3.1.   During the test, the temperature in the test room must be maintained at between 20 °C and 30 °C or at a higher temperature if the tyre manufacturer agrees.
      3.2.   The tyres to be tested shall have passed the load speed performance test according to Annex 7 to the Regulation, without showing any defect.
      3.3.   The tyre to be tested shall be fitted to a wheel having a rim conforming to the applicable standard.
      3.4.   The tyre inflation pressure (testing pressure) shall be adjusted to the values indicated in paragraph 3.4.1 below.
      
                  3.4.1.
               
               
                  Road tyres in bias and bias/belted construction.
                  
                              Speed category
                           
                           
                              Tyre construction
                           
                           
                              Testing pressure
                           
                        
                               
                           
                           
                               
                           
                           
                              bar
                           
                           
                              kPA
                           
                        
                              P/Q/R/S
                           
                           
                              standard
                           
                           
                              2,5
                           
                           
                              250
                           
                        
                              T and above
                           
                           
                              standard
                           
                           
                              2,9
                           
                           
                              290
                           
                        
            3.5.   The tyre/wheel assembly shall be stored at the temperature of the testing room for a period of at least 3 hours.
      3.6.   After this conditioning storage period the inflation pressure shall be readjusted to the value indicated in paragraph 3.4.
      3.7.   Mount the tyre and rim assembly on the test axle and ensure the assembly is freely rotating. The tyre can be rotated either by means of a drive motor acting on the tyre axis or by pressing it against a test drum.
      3.8.   Accelerate the assembly without interruption to reach within five minutes the maximum speed capability of the tyre.
      3.9.   Position the contour outline device and ascertain that it is perpendicular to the rotation of the test tyre tread.
      3.10.   Check that the peripheral speed of the tread surface is within ± 2 per cent of the maximum speed capability for the tyre. Maintain the equipment at constant speed for at least five minutes and then portray the tyre cross-section in the area of maximum deformation, or check that the tyre does not exceed the enveloping curve.
      4.   EVALUATION
      4.1.   The limiting curve (enveloping curve) specified for the mounted tyre/wheel assembly shall be as in the example below):
      
         Enveloping curve for centrifugal growth test
      
      
         
      In accordance with paragraphs 6.1.4 and 6.1.5 of the Regulation, the following limit values have been established for the enveloping curve:
      
                  Speed Category
               
               
                  H dyn (mm)
               
            
                   
               
               
                  Category of Use:
                  Normal
               
               
                  Category of Use:
                  Snow and special
               
            
                  P/Q/R/S
               
               
                  H × 1,10
               
               
                  H × 1,15
               
            
                  T/U/H
               
               
                  H × 1,13
               
               
                  H × 1,18
               
            
                  Over 210 km/h
               
               
                  H × 1,16
               
               
                  —
               
            
                  4.1.1.
               
               
                  The main dimensions of the enveloping curve must be adjusted, if applicable, taking into account the constant ratio K (see paragraph 2.2 above).
               
            4.2.   The contour of the tyre portrayed at the maximum speed shall not exceed the enveloping curve, with reference to the tyre axes.
      4.3.   The tyre is not subjected to a further test.