02008X0711(01) — EN — 17.03.2010 — 001.001

This text is meant purely as a documentation tool and has no legal effect. The Union's institutions do not assume any liability for its contents. The authentic versions of the relevant acts, including their preambles, are those published in the Official Journal of the European Union and available in EUR-Lex. Those official texts are directly accessible through the links embedded in this document

►B Only the original UNECE 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 54 of the Economic Commission for Europe of the United Nations (UNECE) — Uniform provisions concerning the approval of pneumatic tyres for commercial vehicles and their trailers (OJ L 183 11.7.2008, p. 41)

Amended by:









▼B

Only the original UNECE 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 54 of the Economic Commission for Europe of the United Nations (UNECE) — Uniform provisions concerning the approval of pneumatic tyres for commercial vehicles and their trailers

Incorporating all valid text up to:

Supplement 16 to the original version of the Regulation — Date of entry into force: 13 November 2004

CONTENTS REGULATION 1. Scope 2. Definitions 3. Markings 4. Application for approval 5. Approval 6. Specifications 7. Modification and extension of approval of a tyre type 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 I Communication concerning the approval or extension or refusal or withdrawal of approval or production definitely discontinued of a type of pneumatic tyre for motor vehicles pursuant to Regulation No 54 Annex II Arrangement of approval mark Annex III Arrangement of tyre markings Annex IV List of symbols of load-capacity indices Annex V Tyre-size designation and dimensions: Part I — European tyres; Part II — United States tyres Annex VI Method of measuring pneumatic tyres Annex VII Procedure for load/speed endurance tests Appendix 1 — Endurance-test programme Appendix 2 — Relation between the pressure index and the units of pressure Annex VIII Variation of load capacity with speed commercial vehicle tyres, radial and diagonal Annex IX COMMUNICATION, Upgrade of Service Description for the purposes of retreading in accordance with Regulation No 109

▼M1

1. SCOPE

This Regulation covers new pneumatic tyres designed primarily for vehicles of categories M2, M3, N, O3 and O4 ( *1 ) ( *2 ). However, it does not apply to tyre types identified by speed category symbols corresponding to speeds below 80 km/h.

▼B

2. DEFINITIONS

For the purposes 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;

2.1.4. Structure (diagonal (bias-ply); radial);

2.1.5. Speed category;

2.1.6. Load-capacity indices; and

2.1.7. Cross-section;

2.2. Category of use:

2.2.1. ‘Normal tyre’ means a tyre intended for normal, everyday, on-road use;

2.2.2. ‘Special use tyre’ means a tyre intended for mixed use both on- and off-road or for other special duty.

2.2.3. ‘Snow tyre’ means a tyre whose tread pattern, tread compound or structure are primarily designed to achieve in snow conditions a performance better than that of a normal tyre with regard to its ability to initiate or maintain vehicle motion.

2.3. ‘Structure’ of a pneumatic tyre means the technical characteristics of the tyre's carcass. A distinction is made between the following structures in particular:

2.3.1. ‘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 centreline of the tread;

2.3.2. ‘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 stabilized by an essentially inextensible circumferential belt.

2.4. ‘Bead’ means the part of a pneumatic tyre which is of such shape and structure as to fit the rim and to hold the tyre on it ( 1 );

2.5. ‘Cord’ means the strands forming the fabric of the plies in the pneumatic tyre (1) ;

2.6. ‘Ply’ means a layer of rubber-coated parallel cords (1) ;

2.7. ‘Carcass’ means that part of a pneumatic tyre other than the tread and the rubber sidewalls which, when inflated, bears the load (1) ;

2.8. ‘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 (1) ;

2.9. ‘Sidewall’ means the part of a pneumatic tyre between the tread and the area designed to be covered by the rim flange (1) ;

2.10. ‘Lower sidewall’ means the area included between the line of maximum section width of the tyre and the area designed to be covered by the rim flange (1) ;

2.10.1. However, in case of tyres identified by the ‘tyre to rim fitment configuration’ (see paragraph 3.1.11) symbol ‘A’, it means the area of the tyre which is seating on the rim.

2.11. ‘Tread groove’ means the space between two adjacent ribs and/or blocks in the tread pattern (1) ;

2.12. ‘Section width (S)’ means the linear distance between the outsides of the sidewalls of an inflated pneumatic tyre, excluding elevations due to labelling (marking), decoration or protective bands or ribs (1) ;

2.13. ‘Over-all width’ means the linear distance between the outsides of the sidewalls of an inflated pneumatic tyre, including labelling (marking), decoration and protective bands or ribs (1) ;

2.14. ‘Section height (H)’ means a distance equal to half the difference between the outer diameter of the tyre and the nominal rim diameter;

2.15. ‘Nominal aspect ratio (Ra)’ means one hundred times 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;

2.16. ‘Outer diameter (D)’ means the overall diameter of an inflated new pneumatic tyre (1) ;

2.17. ‘Tyre-size designation’ means:

2.17.1. A designation showing:

2.17.1.1. The nominal section width (S1). This width 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 V to this Regulation;

2.17.1.2. 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 V to this Regulation or, depending on the tyre design type, the nominal outer diameter expressed in mm;

2.17.1.3. A conventional number ‘d’ (the ‘d’ symbol) denoting the nominal diameter of the rim and corresponding to its diameter expressed either in codes (number below 100) or in millimetres (numbers above 100). Numbers corresponding to both types of measurement may be used together in the designation;

2.17.1.3.1. The values of the ‘d’ symbols expressed in millimetres are shown below:







Nominal rim diameter code (‘d’ symbol) Value of the ‘d’ symbol expressed in mm 8 203 9 229 10 254 11 279 12 305 13 330 14 356 15 381 16 406 17 432 18 457 19 482 20 508 21 533 22 559 24 610 25 635 14,5 368 16,5 419 17,5 445 19,5 495 20,5 521 22,5 572 24,5 622 26 660 28 711 30 762

2.17.1.4. An indication of the tyre to rim fitment configuration when it differs from the standard configuration and is not already expressed by the symbol ‘d’ denoting the nominal rim diameter code.

2.18. ‘Nominal rim diameter (d)’ means the diameter of the rim on which a tyre is designed to be mounted (1) ;

2.19. ‘Rim’ means the support for a tyre-and-tube assembly, or for a tubeless tyre, on which support the tyre beads are seated (1) ;

2.20. ‘Theoretical rim’ means a 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 type;

2.21. ‘Measuring rim’ means the rim on which a tyre must be fitted for dimensional measurements;

2.22. ‘Test rim’ means the rim on which a tyre must be fitted for load/speed endurance testing;

2.23. ‘Chunking’ means the breaking away of pieces of rubber from the tread;

2.24. ‘Cord separation’ means the parting of the cords from their coating;

2.25. ‘Ply separation’ means the parting of adjacent plies;

2.26. ‘Tread separation’ means the pulling away of the tread from the carcass;

2.27. ‘Load-capacity index’ means one or two numbers which indicate the load the tyre can carry in single or in single and dual operation at the speed corresponding to the associated speed category and when operated in conformity with the requirements governing utilization specified by the manufacturer. A type of pneumatic tyre can have either one or two sets of load capacity indices depending on whether or not the provisions of paragraph 6.2.5 are applied. The list of these indices and their corresponding loads is given in Annex IV;

2.28. ‘Speed category’ means:

2.28.1. The speeds, indicated by a symbol, at which the tyre can carry the load indicated by the associated load-capacity index;

2.28.2. The speed categories are as shown in the table below ( 2 ):







Speed-category symbol Corresponding speed (km/h) 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

2.29. ‘Table load-capacity variation with speed’ means:

The table, in Annex VIII, showing as a function of the load-capacity indices and nominal-speed-category symbols the load variations which a pneumatic tyre can withstand when used at speeds different from that conforming to its nominal-speed-category symbol. The load variations do not apply in the case of the additional load capacity symbol and speed category obtained when the provisions of paragraph 6.2.5 are applied.

3. MARKINGS

3.1. Pneumatic tyres submitted for approval shall display on both sidewalls in the case of symmetrical tyres and at least on the outer sidewall in the case of asymmetrical tyres: 3.1.1. The manufacturer's name or trade mark; 3.1.2. The tyre-size designation as defined in paragraph 2.17 of this Regulation; 3.1.3. An indication of the structure as follows: 3.1.3.1. On diagonal (bias-ply) tyres: no indication, or the letter ‘D’; 3.1.3.2. On radial-ply tyres: the letter ‘R’ placed in front of the rim-diameter marking and, optionally, the word ‘RADIAL’; 3.1.4. The speed-category symbol (or symbols); 3.1.4.1. An indication of the tyre's nominal speed category in the form of the symbol prescribed in paragraph 2.28.2 above; 3.1.4.2. An indication of a second speed category in cases where paragraph 6.2.5 below is applied; 3.1.5. The inscription M+S or M.S or M&S in the case of a snow tyre; 3.1.6. The load-capacity indices as defined in paragraph 2.27 of this Regulation; 3.1.7. The word ‘TUBELESS’ if the tyre is designed for use without an inner tube; 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. However, this marking, which it is permissible to restrict to one sidewall, shall not be mandatory, on any tyre submitted for approval, until two years after the date of entry into force of this Regulation ( 3 ); 3.1.9. In the case of tyres which can be regrooved, the symbol ‘ ’ at least 20 mm in diameter, or the word ‘REGROOVABLE’, moulded into or on to each sidewall; 3.1.10. An indication, by the ‘PSI’ index, of the inflation pressure to be adopted for the load/speed endurance tests, as explained in Annex VII, Appendix 2. However, this indication, which it is permissible to restrict to one sidewall, shall not be mandatory, on any tyre submitted for approval, until two years after the date of entry into force of this Regulation. 3.1.11. In the case of tyres first approved after 1 March 2004 the identification referred to in paragraph 2.17.1.4 shall be placed only immediately after the rim diameter marking referred to in paragraph 2.17.1.3. 3.1.12. The inscription ‘ET’ or ‘ML’ or ‘MPT’ for ‘Special use tyres’ ( 4 ). 3.1.13. The suffix ‘C’ or ‘LT’ after the rim diameter marking referred to in paragraph 2.17.1.3, and, if applicable, after the tyre to rim fitment configuration referred to in paragraph 2.17.1.4: 3.1.13.1. this marking is optional in the case of tyres fitted on 5 ° drop centre rims, suitable for single and dual fitment, having a load capacity index in single lower or equal to 121 and destined for the equipment of motor vehicles. 3.1.13.2. this marking is mandatory in the case of tyres fitted on 5 ° drop centre rims, suitable for single fitment only, having a load capacity index higher or equal to 122 and destined for the equipment of motor vehicles. 3.1.14. The suffix ‘CP’ after the rim diameter marking referred to in paragraph 2.17.1.3, and, if applicable, after the tyre to rim fitment configuration referred to in paragraph 2.17.1.4. This marking is mandatory in the case of tyres fitted on 5 ° drop centre rims, having a load capacity index in single lower or equal to 121 and specifically designed for the equipment of motor caravans. 3.1.15. The inscription ‘FRT’ (Free Rolling Tyre) in case of tyres designed for the equipment of trailer axles and axles of motor vehicles other than front steering and drive axles.

3.2. Tyres shall exhibit a free space sufficiently large to accommodate an approval mark as shown in Annex II to this Regulation.

3.3. Annex III to this Regulation gives an example of an arrangement 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 and shall, except for the marking referred to in paragraph 3.1.1 above, be located on at least one lower sidewall. 3.4.1. However, for tyres identified by the ‘tyre to rim fitment configuration’ (see paragraph 3.1.11) symbol ‘A’, the markings may be placed anywhere on the sidewall of the tyre.

4. APPLICATION FOR APPROVAL

4.1. The application for approval of a type of pneumatic tyre shall be submitted by the holder of the manufacturer's name or trade mark or by his duly accredited representative. It shall specify: 4.1.1. The tyre-size designation as defined in paragraph 2.17 of this Regulation; 4.1.2. The manufacturer's name or trade mark; 4.1.3. The category of use (normal or special or snow); 4.1.4. Structure: diagonal (bias ply) or radial; 4.1.5. The speed category; 4.1.6. The load-capacity indices; 4.1.7. Whether the tyre is intended to be used with or without an inner tube; 4.1.8. The overall dimensions: overall section width and outer diameter; 4.1.9. The factor ‘x’ referred to in paragraph 2.20 above; 4.1.10. The rims on which the tyre can be mounted; 4.1.11. The measuring rim and test rim; 4.1.12. The measuring pressure and test pressure index; 4.1.13. The additional load/speed combinations in cases where paragraph 6.2.5 below is applied.

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 one year after the date of issue of the type approval.

4.3. The competent authority shall verify the existence of satisfactory arrangements for ensuring effective control of the conformity of production before type approval is granted.

4.4. 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 type of 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 same Contracting Party may not assign the same number to another type of pneumatic tyre.

5.3. Notice of approval or of refusal of approval of a type of pneumatic tyre pursuant to this Regulation shall be communicated to the Parties to the Agreement which apply this Regulation by means of a form conforming to the model in Annex I to this Regulation.

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 ( 5 ); and 5.4.2. an approval number.

5.5. The approval mark shall be clearly legible and be indelible.

5.6. Annex II to this Regulation gives an example of the arrangement of the approval mark.

5.7. Subsequent retreading in accordance with Regulation No 109. In the case where, during the course of production of a particular tyre type, the manufacturer has obtained a new approval for that same tyre type to be marked with a service description indicating a higher load index or different speed symbol than the earlier marking and where the tyre manufacturer authorizes the earlier tyre type to be retreaded and marked with the later service description, the tyre manufacturer shall complete the Communication document given in annex IX to this Regulation and shall submit this to the type approval authority that has granted the new approval. If the authorization for upgrading only applies to tyres from a particular manufacturing plant, or produced during particular production periods, the information necessary to identify the tyres shall be stated on the Communication document. The type approval authority shall communicate this information to other Parties to the Agreement which apply this Regulation and tyre manufacturers or type approval authorities shall release this information on the request of any retreading production unit that is approved in accordance with ‘Regulation No 109.’

6. SPECIFICATIONS

6.1. Dimensions of tyres

6.1.1. Section width of a tyre

6.1.1.1. The section width shall be 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 sidewall of the tyre in the tyre designation as prescribed; A = is the width of the measuring rim in millimetres, as shown by the manufacturer in the descriptive note; and A1 = is the width of the theoretical rim in millimetres. A1 shall be taken to equal S1 multiplied by the factor x as specified by the manufacturer, and K shall be taken to equal 0.4.

6.1.1.2. However, for the existing types of tyres whose designation is given in the first column of the tables in Annex V to this Regulation, the section width shall be deemed to be that given opposite the tyre designation in those tables.

6.1.1.3. However, for tyres identified by the ‘tyre to rim fitment configuration’ (see paragraph 3.1.11) symbol ‘A’, K shall be taken to equal 0.6.

6.1.2. Outer diameter of a tyre

6.1.2.1. The outer diameter of a tyre shall be 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 2.17.1.3 above, expressed in millimetres; S1 is the nominal section width in millimetres; Ra is the nominal aspect ratio; H is the nominal section height in millimetres and is equal to S1 × 0,01 Ra. All as in the tyre designation shown on the sidewall of the tyre in conformity with the requirements of paragraph 3.4 above.

6.1.2.2. However, for the existing types of tyres whose designation is given in the first column of the tables in Annex V to this Regulation, the outer diameter shall be deemed to be that given opposite the tyre designation in those tables.

6.1.2.3. However, for tyres identified by the ‘tyre to rim fitment configuration’ (see paragraph 3.1.11) symbol ‘A’, the outer diameter shall be that specified in the tyre size designation as shown on the sidewall of the tyre.

6.1.3. Method of measuring pneumatic tyres

The dimensions of pneumatic tyres shall be measured by the procedure described in annex VI 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 or widths determined pursuant to paragraph 6.1.1 above.

6.1.4.2. It may exceed that value by 4 per cent in case of radial-ply tyres and by 8 per cent in the case of diagonal (bias-ply) tyres. However, for tyres with nominal section width exceeding 305 mm intended for dual mounting (twinning), the value determined pursuant to paragraph 6.1.1 above shall not be exceeded by more than 2 per cent for radial-ply tyres with nominal aspect ratio higher than 60, or 4 per cent for diagonal (bias-ply) tyres.

6.1.4.3. However, for tyres identified by the ‘tyre to rim fitment configuration’ (see paragraph 3.1.11) symbol ‘A’, the overall width of the tyre, in the lower area of the tyre, equals the nominal width of the rim on which the tyre is mounted, as shown by the manufacturer in the descriptive note, increased by 27 mm.

6.1.5. Tyre outer diameter specifications

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:

6.1.5.1. For sizes listed in Annex V and for tyres identified by the ‘tyre to rim fitment configuration’ (see paragraph 3.1.11) symbol ‘A’, the nominal section height H is equal to:

H = 0.5 (D-d) — for references see paragraph 6.1.2.1.

6.1.5.2. For other sizes, not listed in Annex V

‘H’ and ‘d’ are as defined in paragraph 6.1.2.1.

6.1.5.3. Coefficients ‘a’ and ‘b’ are respectively:

6.1.5.3.1. Coefficient ‘a’ =.97

6.1.5.3.2. Coefficient ‘b’







Radial Diagonal for normal use tyres 1,04 1,07 for special use tyres 1,06 1,09

6.1.5.3.3. For snow tyres the outer diameter (Dmax) established in conformity with the above may be exceeded by 1 per cent.

6.2. Load/speed endurance test

6.2.1. Each type of pneumatic tyre shall undergo at least one load/speed endurance tests carried out by the procedure described in Annex VII to this Regulation.

6.2.2. A tyre which, after undergoing the endurance 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 six hours after the load/speed endurance test, must not differ by more than ± 3,5 per cent from the outer diameter as measured before the test.

6.2.4. Where application is made for the approval of a type of pneumatic tyre for the load/speed combinations given in the table in Annex VIII, the endurance test prescribed in paragraph 6.2.1 above need not be carried out for load and speed values other than the nominal values.

6.2.5. Where application is made for the approval of a type of pneumatic tyre which has a load/speed combination in addition to the one that is subject to the variation of load with speed given in the table in Annex VIII, the endurance test prescribed in paragraph 6.2.1 above shall also be carried out on a second tyre of the same type at the additional load/speed combination.

7. MODIFICATION AND EXTENSION OF APPROVAL OF A TYRE TYPE

7.1. Every modification of a tyre type shall be notified to the administrative department which approved the tyre type. That 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 tyre still meets the requirements; or 7.1.2. Require a further test report from the technical service responsible for carrying out the tests.

7.2. A modification of the tread pattern of the tyre shall not be considered to necessitate a repetition of the tests prescribed in paragraph 6 of this Regulation.

7.3. 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.

7.4. The competent authority issuing the extension of approval shall assign a series number for such an extension and inform thereof the other Parties to the 1958 Agreement applying this Regulation by means of a communication form conforming to the model in Annex I to this Regulation.

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 two 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 requirement laid down in paragraph 8.1 above is 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 which applies 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 I 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 copies of the communication form conforming to the model in Annex I to this Regulation.

11. NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR CONDUCTING 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 conducting approval tests and, where applicable, of the approved test laboratories and of the administrative departments which grant approval and to which forms certifying approval 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, those among them which are situated on their territory or on the territory of another Party to the Agreement subject to a preliminary agreement to this 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. Explanatory figure (See paragraph 2 of the Regulation)









ANNEX I

COMMUNICATION

(Maximum format: A4 (210 × 297 mm))









ANNEX II

ARRANGEMENT OF APPROVAL MARK

a = 12 mm (min.)

The above approval mark affixed to a pneumatic tyre shows that the type of tyre concerned has been approved in the Netherlands (E 4) under approval number 002439. The first two digits of the approval number indicate that the approval was granted in accordance with the requirements of Regulation No 54 in its original form.

Note:

The approval number must be placed close to the circle and either above or below the ‘E’ or to left or right of that letter. The digits of the approval number must be on the same side of the ‘E’ and face in the same direction. The use of Roman numerals as approval numbers should be avoided so as to prevent any confusion with other symbols.









ANNEX III

Arrangement of tyre markings







Minimum heights of markings (mm) Tyres of nominal rim diameter < 508 mm (Code 20) or of nominal section width ≤ 235 mm (Code 9) Tyres of nominal rim diameter ≥ 508 mm (Code 20) or of nominal section width > 235 mm (Code 9) B 6 9 C 4 D 6

1. These markings, given as an example, define a pneumatic tyre: Having a nominal section width of 255; Having a nominal aspect ratio of 70; Of radial-ply structure (R); Having a nominal rim diameter of 572 mm, for which the symbol is 22.5; Having load capacities of 3 150 kg when single and 2 900 kg when twinned (dual), corresponding respectively to the load indices 148 and 145 shown in Annex IV to this Regulation; Having a reference speed of 100 km/h corresponding to speed category symbol: J Classified in the category of use Snow: M + S Able to be used additionally at 120 km/h (speed category symbol L) with a load capacity of 3 000 kg when single and 2 725 kg when twinned (dual), corresponding respectively to the load indices 145 and 143 shown in Annex IV to this Regulation Capable of being fitted without inner tube: ‘TUBELESS’ Manufactured during the twenty-fifth week of the year 2003, and Requiring to be inflated to 620 kPa for load/speed endurance tests, for which the PSI symbol is 90.

2. In the particular case of tyres having a tyre to rim fitment configuration ‘A’, the marking shall be in the form of the following example: 235-700 R 450A where: 235 is the nominal section width in mm 700 is the outer diameter expressed in mm R is an indication of the structure of the tyre — see paragraph 3.1.3. of this Regulation 450 is the nominal diameter of the rim expressed in mm A is the tyre to rim fitment configuration. The marking of the load index, speed category symbol, date of manufacture and other markings, shall be as given in example 1 above.

3. The positioning and order of the markings constituting the tyre designation shall be the following: (a) The tyre-size designation as defined in paragraph 2.17. of this Regulation shall be grouped as shown in above examples: 255/70 R 22.5 or 235-700 R 450A; (b) The service description comprising the load index/indices and the speed symbol shall be placed immediately after the tyre size designation as defined in paragraph 2.17 of this Regulation; (c) The symbols ‘TUBELESS’ and ‘M+S’ or ‘FRT’ or ‘MPT’ (and equivalents) may be at a distance from the tyre size designation; (d) If paragraph 6.2.5. of this Regulation is applied, the additional load-capacity indices and speed-category symbol must be shown inside a circle near the nominal load-capacity indices and speed-category-symbol appearing on the tyre sidewall.









ANNEX IV







List of symbols of load-capacity indices Load-capacity index Corresponding maximum mass to be carried (kg) 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 91 615 92 630 93 650 94 670 95 690 96 710 97 730 98 750 99 775 100 800 101 825 102 850 103 875 104 900 105 925 106 950 107 975 108 1 000 109 1 030 110 1 060 111 1 090 112 1 120 113 1 150 114 1 180 115 1 215 116 1 250 117 1 285 118 1 320 119 1 360 120 1 400 121 1 450 122 1 500 123 1 550 124 1 600 125 1 650 126 1 700 127 1 750 128 1 800 129 1 850 130 1 900 131 1 950 132 2 000 133 2 060 134 2 120 135 2 180 136 2 240 137 2 300 138 2 360 139 2 430 140 2 500 141 2 575 142 2 650 143 2 725 144 2 800 145 2 900 146 3 000 147 3 075 148 3 150 149 3 250 150 3 350 151 3 450 152 3 550 153 3 650 154 3 750 155 3 875 156 4 000 157 4 125 158 4 250 159 4 375 160 4 500 161 4 625 162 4 750 163 4 875 164 5 000 165 5 150 166 5 300 167 5 450 168 5 600 169 5 800 170 6 000 171 6 150 172 6 300 173 6 500 174 6 700 175 6 900 176 7 100 177 7 300 178 7 500 179 7 750 180 8 000 181 8 250 182 8 500 183 8 750 184 9 000 185 9 250 186 9 500 187 9 750 188 10 000 189 10 300 190 10 600 191 10 900 192 11 200 193 11 500 194 11 800 195 12 150 196 12 500 197 12 850 198 13 200 199 13 600 200 14 000









ANNEX V

Tyre-size designation and dimensions

PART I

EUROPEAN TYRES







Table A Code designated sizes mounted on 5° tapered rims or flat base rims. Radial and diagonal constructions Tyre Size Designation ((+)) Measuring Rim Width Code Nominal Rim Diameter d (mm) Outer Diameter D (mm) Section Width S (mm) Radial Diagonal Radial Diagonal Std. series 4.00R8 (1) 2.50 203 414 414 107 107 4.00R10 (1) 3.00 254 466 466 108 108 4.00R12 (1) 3.00 305 517 517 108 108 4.50R8 (1) 3.50 203 439 439 125 125 4.50R10 (1) 3.50 254 490 490 125 125 4.50R12 (1) 3.50 305 545 545 125 128 5.00R8 (1) 3.00 203 467 467 132 132 5.00R10 (1) 3.50 254 516 516 134 134 5.00R12 (1) 3.50 305 568 568 134 137 6.00R9 4.00 229 540 540 160 160 6.00R14C 4.50 356 626 625 158 158 6.00R16 (1) 4.50 406 728 730 170 170 6.50R10 5.00 254 588 588 177 177 6.50R14C 5.00 356 640 650 170 172 6.50R16 (1) 4.50 406 742 748 176 176 6.50R20 (1) 5.00 508 860 — 181 — 7.00R12 5.00 305 672 672 192 192 7.00R14C 5.00 356 650 668 180 182 7.00R15 (1) 5.00 381 746 752 197 198 7.00R16C 5.50 406 778 778 198 198 7.00R16 5.50 406 784 774 198 198 7.00R20 5.50 508 892 898 198 198 7.50R10 5.50 254 645 645 207 207 7.50R14C 5.50 356 686 692 195 192 7.50R15 (1) 6.00 381 772 772 212 212 7.50R16 (1) 6.00 406 802 806 210 210 7.50R17 (1) 6.00 432 852 852 210 210 7.50R20 6.00 508 928 928 210 213 8.25R15 6.50 381 836 836 230 234 8.25R16 6.50 406 860 860 230 234 8.25R17 6.50 432 886 895 230 234 8.25R20 6.50 508 962 970 230 234 9.00R15 6.00 381 840 840 249 249 9.00R16 (1) 6.50 406 912 900 246 252 9.00R20 7.00 508 1 018 1 012 258 256 10.00R15 7.50 381 918 918 275 275 10.00R20 7.50 508 1 052 1 050 275 275 10.00R22 7.50 559 1 102 1 102 275 275 11.00R16 6.50 406 980 952 279 272 11.00R20 8.00 508 1 082 1 080 286 291 11.00R22 8.00 559 1 132 1 130 286 291 11.00R24 8.00 610 1 182 1 180 286 291 12.00R20 8.50 508 1 122 1 120 313 312 12.00R22 8.50 559 1 174 1 174 313 312 12.00R24 8.50 610 1 226 1 220 313 312 13.00R20 9.00 508 1 176 1 170 336 342 14.00R20 10.00 508 1 238 1 238 370 375 14.00R24 10.00 610 1 340 1 340 370 375 16.00R20 13.00 508 1 370 1 370 446 446 80 Series 12/80 R 20 8.50 508 1 008 — 305 — 13/80 R 20 9.00 508 1 048 — 326 — 14/80 R 20 10.00 508 1 090 — 350 — 14/80 R 24 10.00 610 1 192 — 350 — 14.75/80 R 20 10.00 508 1 124 — 370 — 15.5/80 R 20 10.00 508 1 158 — 384 — Wide Base Tyres for Multipurpose Trucks 7.50 R 18 MPT 5.50 457 885 208 10.5 R 18 MPT 9 457 905 276 270 10.5 R 20 MPT 9 508 955 276 270 12.5 R 18 MPT 11 457 990 330 325 12.5 R 20 MPT 11 508 1 040 330 325 14.5 R 20 MPT 11 508 1 095 362 355 14.5 R 24 MPT 11 610 1 195 362 355 (+) Tyres in diagonal construction are identified by an hyphen in place of the letter ‘R’ (e.g. 5.00-8). (*1) The tyre size designation may be supplemented with the letter ‘C’ (e.g. 6.00-16C).







Table B Code designated sizes mounted on 15° tapered rims — radial Tyre size designation Measuring rim width code Nominal rim diameter d (mm) Outer diameter D (mm) Section Width S (mm) 7 R 17.5 (1) 5.25 445 752 185 7 R 19.5 5.25 495 800 185 8 R 17.5 (1) 6.00 445 784 208 8 R 19.5 6.00 495 856 208 8 R 22.5 6.00 572 936 208 8.5 R 17.5 6.00 445 802 215 9 R 17.5 6.75 445 820 230 9 R 19.5 6.75 495 894 230 9 R 22.5 6.75 572 970 230 9.5 R 17.5 6.75 445 842 240 9.5 R 19.5 6.75 495 916 240 10 R 17.5 7.50 445 858 254 10 R 19.5 7.50 495 936 254 10 R 22.5 7.50 572 1 020 254 11 R 22.5 8.25 572 1 050 279 11 R 24.5 8.25 622 1 100 279 12 R 22.5 9.00 572 1 084 300 13 R 22.5 9.75 572 1 124 320 15 R 19.5 11.75 495 998 387 15 R 22.5 11.75 572 1 074 387 16.5 R 19.5 13.00 495 1 046 425 16.5 R 22.5 13.00 572 1 122 425 18 R 19.5 14.00 495 1 082 457 18 R 22.5 14.00 572 1 158 457 70 Series 10/70 R 22.5 7.50 572 928 254 11/70 R 22.5 8.25 572 962 279 12/70 R 22.5 9.00 572 1 000 305 13/70 R 22.5 9.75 572 1 033 330 (*1) The tyre size designation may be supplemented with the letter ‘C’ (e.g. 7 R 17.5C).







Table C Tyres for light commercial vehicles — radial and diagonal constructions Tyre size designation ((+)) Measuring rim width code Nominal rim diameter d (mm) Outer diameter D (mm) Section Width S (mm) Radial Diagonal Radial Diagonal Metric Designated 145 R 10 C 4.00 254 492 — 147 — 145 R 12 C 4.00 305 542 — 147 — 145 R 13 C 4.00 330 566 — 147 — 145 R 14 C 4.00 356 590 — 147 — 145 R 15 C 4.00 381 616 — 147 — 155 R 12 C 4.50 305 550 — 157 — 155 R 13 C 4.50 330 578 — 157 — 155 R 14 C 4.50 356 604 — 157 — 165 R 13 C 4.50 330 596 — 167 — 165 R 14 C 4.50 356 622 — 167 — 165 R 15 C 4.50 381 646 — 167 — 175 R 13 C 5.00 330 608 — 178 — 175 R 14 C 5.00 356 634 — 178 — 175 R 16 C 5.00 406 684 — 178 — 185 R 13 C 5.50 330 624 — 188 — 185 R 14 C 5.50 356 650 — 188 — 185 R 15 C 5.50 381 674 — 188 — 185 R 16 C 5.50 406 700 — 188 — 195 R 14 C 5.50 356 666 — 198 — 195 R 15 C 5.50 381 690 — 198 — 195 R 16 C 5.50 406 716 — 198 — 205 R 14 C 6.00 356 686 — 208 — 205 R 15 C 6.00 381 710 — 208 — 205 R 16 C 6.00 406 736 — 208 — 215 R 14 C 6.00 356 700 — 218 — 215 R 15 C 6.00 381 724 — 218 — 215 R 16 C 6.00 406 750 — 218 — 245 R 16 C 7.00 406 798 798 248 248 17 R 15 C 5.00 381 678 — 178 — 17 R 380 C 5.00 381 678 — 178 — 17 R 400 C 150 mm 400 698 — 186 — 19 R 400 C 150 mm 400 728 — 200 — Code Designated 5.60 R 12 C 4.00 305 570 572 150 148 6.40 R 13 C 5.00 330 648 640 172 172 6.70 R 13 C 5.00 330 660 662 180 180 6.70 R 14 C 5.00 356 688 688 180 180 6.70 R 15 C 5.00 381 712 714 180 180 (+) Tyres in diagonal construction are identified by an hyphen in place of the letter ‘R’ (e.g. 145-10 C).







Table D Tyres for special applications — radial and diagonal construction Tyre size designation ((+)) Measuring rim width code Nominal rim diameter d (mm) Outer diameter D (mm) Section Width S (mm) Code Designated 15×4 1/2-8 3.25 203 385 122 16×6-8 4.33 203 425 152 18×7 4.33 203 462 173 18×7-8 4.33 203 462 173 21×8-9 6.00 229 535 200 21×4 2.32 330 565 113 22×4 1/2 3.11 330 595 132 23×5 3.75 330 635 155 23×9-10 6.50 254 595 225 25×6 3.75 330 680 170 27×10-12 8.00 305 690 255 28×9-15 7.00 381 707 216 Metric designated 200-15 6.50 381 730 205 250-15 7.50 381 735 250 300-15 8.00 381 840 300 (+) Tyres in radial construction are identified by the letter ‘R’ in place of the hyphen ‘-’ (e.g. 15×4 1/2 R 8).

PART II

UNITED STATES TYRES

— Tolerances shown at the bottom of the tables apply in place of those shown in paras. 6.1.4.2. and 6.1.5.3.

— Outer diameters are listed for the various categories of use: Normal, Snow, Special.







Table A Tyres for light commercial vehicles (LT tyres) Diagonal and radial Tyre size designation (1) Measuring rim width code Nominal rim diameter d (mm) Outer diameter D (mm) (2) Section width S (mm) (3) Normal Snow 6.00-16LT 4.50 406 732 743 173 6.50-16LT 4.50 406 755 767 182 6.70-16LT 5.00 406 722 733 191 7.00-13LT 5.00 330 647 658 187 7.00-14LT 5.00 356 670 681 187 7.00-15LT 5.50 381 752 763 202 7.00-16LT 5.50 406 778 788 202 7.10-15LT 5.00 381 738 749 199 7.50-15LT 6.00 381 782 794 220 7.50-16LT 6.00 406 808 819 220 8.25-16LT 6.50 406 859 869 241 9.00-16LT 6.50 406 890 903 257 G78-15LT 6.00 381 711 722 212 H78-15LT 6.00 381 727 739 222 L78-15LT 6.50 381 749 760 236 L78-16LT 6.50 406 775 786 236 7-14.5LT (4) 6.00 368 677 185 8-14.5LT (4) 6.00 368 707 203 9-14.5LT (4) 7.00 368 711 241 7-17.5LT 5.25 445 758 769 189 8-17.5LT 5.25 445 788 799 199 (1) Tyres in Radial construction are identified by the letter ‘R’ in place of ‘-’ (e.g. 6.00 R 16LT). (2) Coefficient ‘b’ for the calculation of Dmax: 1,08. (3) Overall width may exceed this value up to +8 per cent. (4) The suffix ‘MH’ may replace ‘LT’ in the tyre size designation (e.g. 7-14.5 MH).







Table B Tyres for light commercial vehicles (high flotation tyres) Diagonal and radial Tyre size designation (1) Measuring rim width code Nominal rim diameter d (mm) Outer diameter D (mm) (2) Section width S (mm) (3) Normal Snow 9-15LT 8.00 381 744 755 254 10-15LT 8.00 381 773 783 264 11-15LT 8.00 381 777 788 279 24×7.50-13LT 6 330 597 604 191 27×8.50-14LT 7 356 674 680 218 28×8.50-15LT 7 381 699 705 218 29×9.50-15LT 7.5 381 724 731 240 30×9.50-15LT 7.5 381 750 756 240 31×10.50-15LT 8.5 381 775 781 268 31×11.50-15LT 9 381 775 781 290 31×13.50-15LT 11 381 775 781 345 31×15.50-15LT 12 381 775 781 390 32×11.50-15LT 9 381 801 807 290 33×12.50-15LT 10 381 826 832 318 35×12.50-15LT 10 381 877 883 318 37×12.50-15LT 10 381 928 934 318 37×14.50-15LT 12 381 928 934 372 8.00-16.5LT 6.00 419 720 730 203 8.75-16.5LT 6.75 419 748 759 222 9.50-16.5LT 6.75 419 776 787 241 10-16.5LT 8.25 419 762 773 264 12-16.5LT 9.75 419 818 831 307 30×9.50-16.5LT 7.50 419 750 761 240 31×10.50-16.5LT 8.25 419 775 787 266 33×12.50-16.5LT 9.75 419 826 838 315 37×12.50-16.5LT 9.75 419 928 939 315 37×14.50-16.5LT 11.25 419 928 939 365 33×9.50 R15LT 7.50 381 826 832 240 35×12.50 R16.5LT 10.00 419 877 883 318 37×12.50 R17LT 10.00 432 928 934 318 (1) Tyres in Radial construction are identified by the letter ‘R’ in place of ‘-’ (e.g. 24×7.50 R 13LT). (2) Coefficient ‘b’ for the calculation of Dmax: 1,07. (3) Overall width may exceed this value up to +7 per cent.







Table C Code designated tyres mounted on 5° tapered or flat base rims Diagonal and radial Tyre size designation (1) Measuring rim width code Nominal rim diameter d (mm) Outer diameter D (mm) (2) Section width S (mm) (3) Normal Snow (a) (b) 6.50-20 5 508 878 893 184 7.00-15TR 5.5 381 777 792 199 7.00-18 5.5 457 853 868 199 7.00-20 5.5 508 904 919 199 7.50-15TR 6 381 808 825 215 7.50-17 6 432 859 876 215 7.50-18 6 457 884 901 215 7.50-20 6 508 935 952 215 8.25-15TR 6.5 381 847 855 865 236 8.25-20 6.5 508 974 982 992 236 9.00-15TR 7 381 891 904 911 259 9.00-20 7 508 1 019 1 031 1 038 259 10.00-15TR 7.5 381 927 940 946 278 10.00-20 7.5 508 1 054 1 067 1 073 278 10.00-22 7.5 559 1 104 1 118 1 123 278 11.00-20 8 508 1 085 1 099 1 104 293 11.00-22 8 559 1 135 1 150 1 155 293 11.00-24 8 610 1 186 1 201 1 206 293 11.50-20 8 508 1 085 1 099 1 104 296 12.00-20 8.5 508 1 125 1 146 315 12.00-24 8.5 610 1 226 1 247 315 14.00-20 10 508 1 241 1 266 375 14.00-24 10 610 1 343 1 368 375 (1) Tyres in Radial construction are identified by the letter ‘R’ in place of ‘-’ (e.g. 6.50 R 20). (2) Coefficient ‘b’ for the calculation of Dmax: 1,06. Category of use: Normal Service tyres: (a) Highway tread (b) Heavy tread. (3) Overall width may exceed this value up to +6 per cent.







Table D Code designated tyres for special services Diagonal and radial Tyre size designation Measuring rim width code Nominal rim diameter d (mm) Outer diameter D (mm) (1) Section width S (mm) (2) (a) (b) 10.00-20ML 7.5 508 1 073 1 099 278 11.00-22ML 8 559 1 155 1 182 293 13.00-24ML 9 610 1 302 340 14.00-20ML 10 508 1 266 375 14.00-24ML 10 610 1 368 375 15-19.5ML 11.75 495 1 019 389 24 R 21 18 533 1 372 — 610 (1) Coefficient ‘b’ for the calculation of Dmax: 1,06. (2) Overall width may exceed this value up to +8 per cent.







Table E Code designated tyres mounted on 15° tapered rims Diagonal and radial Tyre size designation (1) Measuring rim width code Nominal rim diameter d (mm) Outer diameter D (mm) (2) Section width S (mm) (3) Normal Snow (a) (b) 8-19.5 6.00 495 859 876 203 8-22.5 6.00 572 935 952 203 9-22.5 6.75 572 974 982 992 229 10-22.5 7.50 572 1 019 1 031 1 038 254 11-22.5 8.25 572 1 054 1 067 1 073 279 11-24.5 8.25 622 1 104 1 118 1 123 279 12-22.5 9.00 572 1 085 1 099 1 104 300 12-24.5 9.00 622 1 135 1 150 1 155 300 12.5-22.5 9.00 572 1 085 1 099 1 104 302 12.5-24.5 9.00 622 1 135 1 150 1 155 302 14-17.5 10.50 445 907 921 349 (—) 15-19.5 11.75 495 1 005 1 019 389 (—) 15-22.5 11.75 572 1 082 1 095 389 (—) 16.5-22.5 13.00 572 1 128 1 144 425 (—) 18-19.5 14.00 495 1 080 1 096 457 (—) 18-22.5 14.00 572 1 158 1 172 457 (—) (1) Tyres in Radial construction are identified by the letter ‘R’ in place of ‘-’ (e.g. 8R19.5). (2) Coefficient ‘b’ for the calculation of Dmax: 1,05. (3) Overall width may exceed this value up to +6 per cent









ANNEX VI

Method of measuring pneumatic tyres

1. The tyre is mounted on the measuring rim specified by the manufacturer pursuant to paragraph 4.1.11 of this Regulation and is inflated to a pressure specified by the manufacturer pursuant to paragraph 4.1.12 of this Regulation.

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 caliper 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 calculated from the maximum circumference.









ANNEX VII

Procedure for load/speed endurance tests

1. PREPARING THE TYRE

1.1. Mount a new tyre on the test rim specified by the manufacturer pursuant to paragraph 4.1.11. of this Regulation.

1.2. Use a new inner tube or combination of inner tube, valve and flap (as required) when testing tyres with inner tubes.

1.3. Inflate the tyre to the pressure corresponding to the pressure index specified by the manufacturer pursuant to paragraph 4.1.12. of this Regulation.

1.4. Condition the tyre-and-wheel assembly at test-room temperature for not less than three hours.

1.5. Readjust the tyre pressure to that specified in paragraph 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 power-driven test drum 1,70 m ± 1 per cent in diameter having a surface at least as wide as the tyre tread.

2.2. Apply to the test axle a series of test loads expressed in per cent of the load indicated, in annex IV to this Regulation, opposite the load index engraved on the sidewall of the tyre, in accordance with the test programme below. Where the tyre has load-capacity indices for both single and twinned utilization, the reference load for single utilization shall be taken as the basis for the test loads. 2.2.1. In the case of tyres with a speed category symbol above P, test procedures are as specified in paragraph 3. 2.2.2. For all other tyre types, the endurance test programme is shown in appendix 1 to this annex.

2.3. The tyre pressure must not be corrected throughout the test and the test load must be kept constant throughout each of the three test stages.

2.4. 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 manufacturer so agrees.

2.5. The endurance-test programme shall be carried out without interruption.

3. LOAD/SPEED TEST PROGRAMME FOR TYRE WITH SPEED CATEGORY SYMBOL Q AND ABOVE

3.1. This programme applies to: 3.1.1. all tyres marked with load capacity index in single 121 or less. 3.1.2. tyres marked with load capacity index in single 122 and above and with the additional marking ‘C’, or ‘LT’, referred to in paragraph 3.1.13. of this Regulation.

3.2. Load placed on the wheel as a percentage of the load corresponding to the load index: 3.2.1. 90 % when tested on a test drum 1,70 m ± 1 per cent in diameter; 3.2.2. 92 % when tested on a test drum 2,0 m ± 1 per cent in diameter.

3.3. Initial test speed: speed corresponding to the speed category symbol less 20 km/h; 3.3.1. Time to reach the initial test speed 10 min. 3.3.2. Duration of the first step = 10 min.

3.4. Second test speed: speed corresponding to the speed category symbol less 10 km/h; 3.4.1. Duration of the second step = 10 min.

3.5. Final test speed: speed corresponding to the speed category symbol: 3.5.1. Duration of the final step = 30 min.

3.6. Total test duration: 1 h.

4. EQUIVALENT TEST METHODS

If a method other than that described in paragraph 2. above is used, its equivalence must be demonstrated.









Appendix 1







Endurance-test programme Load index Tyre speed category Test-drum speed Load placed on the wheel as a percentage of the load corresponding to the load index Radial-ply min-1 Diagonal (bias-ply) min-1 7 h. 16 h. 24 h. 122 or more F 100 100 66 % 84 % 101 % G 125 100 J 150 125 K 175 150 L 200 — M 225 — 121 or less F 100 100 G 125 125 J 150 150 K 175 175 L 200 175 70 % 4 h. 88 % 6 h. 106 % M 250 200 75 % 97 % 114 % N 275 — 75 % 97 % 114 % P 300 — 75 % 97 % 114 %

Notes:

(1) ‘Special-use’ tyres (see paragraph 2.1.3 of the Regulation) should be tested at a speed equal to 85 per cent of the speed prescribed for equivalent normal tyres.

(2) Tyres with load index 122 or more, speed categories N or P and the additional marking ‘LT’, or ‘C’, referred to in paragraph 3.1.13 of this Regulation, shall be tested with the same programme as specified in the above table for tyres with load index 121 or less.









Appendix 2







Relation between the pressure index and the units of pressure Pressure Index (‘PSI’) Bar kPa 20 1,4 140 25 1,7 170 30 2,1 210 35 2,4 240 40 2,8 280 45 3,1 310 50 3,4 340 55 3,8 380 60 4,1 410 65 4,5 450 70 4,8 480 75 5,2 520 80 5,5 550 85 5,9 590 90 6,2 620 95 6,6 660 100 6,9 690 105 7,2 720 110 7,6 760 115 7,9 790 120 8,3 830 125 8,6 860 130 9,0 900 135 9,3 930 140 9,7 970 145 10,0 1 000 150 10,3 1 030 … … …









ANNEX VIII







Variation of load capacity with speed commercial vehicles tyres radial and diagonal (See paras 2.27 and 2.29) Variation of load capacity (per cent) Speed (km/h) All load indices Load indices ≥ 122 (1) Load indices ≤ 121 (1) Speed category symbol Speed category symbol Speed category symbol F G J K L M L M N P (2) 0 150 150 150 150 150 150 110 110 110 110 5 110 110 110 110 110 110 + 90 + 90 + 90 + 90 10 + 80 + 80 + 80 + 80 + 80 + 80 + 75 + 75 + 75 + 75 15 + 65 + 65 + 65 + 65 + 65 + 65 + 60 + 60 + 60 + 60 20 + 50 + 50 + 50 + 50 + 50 + 50 + 50 + 50 + 50 + 50 25 + 35 + 35 + 35 + 35 + 35 + 35 + 42 + 42 + 42 + 42 30 + 25 + 25 + 25 + 25 + 25 + 25 + 35 + 35 + 35 + 35 35 + 19 + 19 + 19 + 19 + 19 + 19 + 29 + 29 + 29 + 29 40 + 15 + 15 + 15 + 15 + 15 + 15 + 25 + 25 + 25 + 25 45 + 13 + 13 + 13 + 13 + 13 + 13 + 22 + 22 + 22 + 22 50 + 12 + 12 + 12 + 12 + 12 + 12 + 20 + 20 + 20 + 20 55 + 11 + 11 + 11 + 11 + 11 + 11 + 17,5 + 17,5 + 17,5 + 17,5 60 + 10 + 10 + 10 + 10 + 10 + 10 + 15,0 + 15,0 + 15,0 + 15,0 65 + 7,5 + 8,5 + 8,5 + 8,5 + 8,5 + 8,5 + 13,5 + 13,5 + 13,5 + 13,5 70 + 5,0 + 7,0 + 7,0 + 7,0 + 7,0 + 7,0 + 12,5 + 12,5 + 12,5 + 12,5 75 + 2,5 + 5,5 + 5,5 + 5,5 + 5,5 + 5,5 + 11,0 + 11,0 + 11,0 + 11,0 80 0 + 4,0 + 4,0 + 4,0 + 4,0 + 4,0 + 10,0 + 10,0 + 10,0 + 10,0 85 – 3 + 2,0 + 3,0 + 3,0 + 3,0 + 3,0 + 8,5 + 8,5 + 8,5 + 8,5 90 – 6 0 + 2,0 + 2,0 + 2,0 + 2,0 + 7,5 + 7,5 + 7,5 + 7,5 95 – 10 – 2,5 + 1,0 + 1,0 + 1,0 + 1,0 + 6,5 + 6,5 + 6,5 + 6,5 100 – 15 – 5 0 0 0 0 + 5,0 + 5,0 + 5,0 + 5,0 105 – 8 – 2 0 0 0 + 3,75 + 3,75 + 3,75 + 3,75 110 – 13 – 4 0 0 0 + 2,5 + 2,5 + 2,5 + 2,5 115 – 7 – 3 0 0 + 1,25 + 1,25 + 1,25 + 1,25 120 – 12 – 7 0 0 0 0 0 0 125 0 – 2,5 0 0 0 130 0 – 5,0 0 0 0 135 – 7,5 – 2,5 0 0 140 – 10 – 5 0 0 145 – 7,5 – 2,5 0 150 – 10,0 – 5,0 0 155 – 7,5 – 2,5 160 – 10,0 – 5,0 (1) The load capacity indices refer to a single operation. (2) Load variations are not allowed for speeds above 160 km/h. For speed category symbols ‘Q’ and above the speed category corresponding to the speed category symbol (see paragraph 2.28.2) specifies the maximum speed permitted for the tyre.









ANNEX IX

COMMUNICATION

Upgrade of Service Description for the purposes of retreading in accordance with Regulation No 109

(Maximum format: A4 (210 × 297 mm))

Issued by (Name and Address of Tyre Manufacturer): …

Declaration:

The tyre corresponding to the following details has been approved to operate at a higher service description than that of the tyre originally approved. It is therefore permitted, subject to any limitations given in paragraph 4.1.1 below, for a tyre bearing the original service description and approval number, to be retreaded to the upgraded service description.

It is also agreed that this information may be released by an approval authority to any retreading production unit that is approved in accordance with Regulation No 109.

1. Manufacturer’s name or trademark on the tyre: …

2. Manufacturer’s tyre type, model or design designation: …

3. Tyre size designation: … 3.1. Category of use (Normal, Snow or Special): …

4. Service description 4.1. Original tyre: … Approval No Pursuant to Regulation No 54 … Granted by: … 4.1.1. Where applicable, the production plant in which tyres suitable for upgrading were produced, the production periods concerned, and the means of identifying either or both of these issues: 4.2. Upgraded tyre: … Approval No pursuant to Regulation No 54: … Granted by: …

5. Authorised by (tyre manufacturer’s representative): 5.1. Name (Block capitals): … 5.2. Department: … 5.3. Signature: …