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
Date: 2008-07-11
Institutions: United Nations Economic Commission for Europe
Subjects: approval, commercial vehicle, pneumatic tyre, technical standard

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ACTS ADOPTED BY BODIES CREATED BY INTERNATIONAL AGREEMENTS

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

Annex II

Annex III

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

Arrangement of approval mark

Arrangement of tyre markings
List of symbols of load-capacity indices
Tyre-size designation and dimensions: Part I — European tyres; Part II — United States tyres

Annex IV
Annex V
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

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1.

SCOPE

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

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.

2.2.3.

2.3.

2.3.1.

2.3.2.

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

‘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.

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

‘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;

‘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);

(*) As defined in the Consolidated Resolution on the Construction of Vehicles (R.E.3)

(document TRANS/WP.29/78/Rev.1).

(1) See explanatory figure.

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2.6.

2.7.

2.8.

2.9.

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

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

‘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);

‘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.

2.13.

2.14.

2.15.

‘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);

‘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);

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

‘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;

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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

9
10

11

12
13

14

15
16

17

18
19

20

21

22
24

25

14,5
16,5

17,5

19,5
20,5

22,5

24,5

26
28

30

203

229
254

279

305
330

356

381
406

432

457
482

508

533

559
610

635

368
419

445

495
521

572

622

660
711

762

2.17.1.4. An indication of the tyre to rim fitment configuration when it differs from the standard
‘d’ denoting the nominal rim

configuration and is not already expressed by the symbol
diameter code.

2.18.

2.19.

2.20.

2.21.

2.22.

2.23.

2.24.

2.25.

2.26.

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

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

‘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;

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

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

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

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

‘Ply separation’ means the parting of adjacent plies;

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

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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,
associated load-capacity index;

indicated by a symbol, at which the tyre can carry the load indicated by the

2.28.2.

The speed categories are as shown in the table below (1):

Speed-category symbol

Corresponding speed (km/h)

F
G
J
K
L
M
N
P
Q
R
S
T
U
H

80
90
100
110
120
130
140
150
160
170
180
190
200
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.

3.1.

MARKINGS

Pneumatic tyres submitted for approval shall display on both sidewalls in the case of symme-
trical 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’;

(1) For consistency, the symbols and speeds shown in this table are the same as those for passenger cars (as in Regulation
No 30). They should not be taken to indicate the speeds at which commercial vehicles fitted with such tyres may be
operated on the roads.

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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.

3.1.8.

3.1.9.

3.1.10.

The word ‘TUBELESS’ if the tyre is designed for use without an inner tube;

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 (1);

In the case of tyres which can be regrooved, the symbol ‘
word ‘REGROOVABLE’, moulded into or on to each sidewall;

’ at least 20 mm in diameter, or the

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’ (2).

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.

(1) Before 1 January 2000, the date of manufacture may be indicated by a group of three digits, the first two showing the

week and the last one the year of manufacture.

(2) This marking shall only be mandatory for tyre types approved to this Regulation after the entry into force of

Supplement 14 to the Regulation.

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3.4.

3.4.1.

4.

4.1.

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.

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.

APPLICATION FOR APPROVAL

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.

4.3.

4.4.

5.

5.1.

The application for approval shall be accompanied (all in triplicate) by a sketch, or a represen-
tative 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.

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

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.

APPROVAL

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.

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5.2.

5.3.

5.4.

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.

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.

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 (1); and

5.4.2.

an approval number.

5.5.

5.6.

5.7.

The approval mark shall be clearly legible and be indelible.

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

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.

6.1.

SPECIFICATIONS

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),

(1) 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 and Montenegro, 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 Community (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 and 48 for New Zealand. 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.

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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.

6.1.2.3.

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.

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.

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6.1.4.2.

6.1.4.3.

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.

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’

for normal use tyres

for special use tyres

Radial

1,04

1,06

Diagonal

1,07

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.

6.2.1.

6.2.2.

6.2.3.

Load/speed endurance test

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.

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.

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.

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6.2.4.

6.2.5.

7.

7.1.

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.

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.

MODIFICATION AND EXTENSION OF APPROVAL OF A TYRE TYPE

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.

7.3.

7.4.

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.

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.

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 Regu-
lation 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.

8.2.

9.

9.1.

9.2.

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.

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.

PENALTIES FOR NON-CONFORMITY OF PRODUCTION

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.

it has
If a Party to the Agreement which applies this Regulation withdraws an approval
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.

L 183/52

EN

Official Journal of the European Union

11.7.2008

11.

11.1.

11.2.

NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR CONDUCTING APPROVAL
TESTS, AND OF ADMINISTRATIVE DEPARTMENTS

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 with-
drawal of approval, issued in other countries, are to be sent.

The Parties to the Agreement which apply this Regulation may use laboratories of tyre manu-
facturers 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,
represented at the tests by one or more persons of its choice.

it may,

if it so desires, be

Explanatory figure

(See paragraph 2 of the Regulation)

11.7.2008

EN

Official Journal of the European Union

L 183/53

ANNEX I

COMMUNICATION

(Maximum format: A4 (210 × 297 mm))

L 183/54

EN

Official Journal of the European Union

11.7.2008

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.

11.7.2008

EN

Official Journal of the European Union

L 183/55

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)

6

9

4

6

B

C

D

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

L 183/56

EN

Official Journal of the European Union

11.7.2008

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.

11.7.2008

EN

Official Journal of the European Union

L 183/57

ANNEX IV

List of symbols of load-capacity indices

Load-capacity index

Corresponding maximum mass to be carried (kg)

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

250

257

265

272

280

290

300

307

315

325

335

345

355

365

375

387

400

412

425

437

450

462

475

487

500

515

530

545

560

580

600

615

630

650

670

690

710

730

L 183/58

EN

Official Journal of the European Union

11.7.2008

Load-capacity index

Corresponding maximum mass to be carried (kg)

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

750

775

800

825

850

875

900

925

950

975

1 000

1 030

1 060

1 090

1 120

1 150

1 180

1 215

1 250

1 285

1 320

1 360

1 400

1 450

1 500

1 550

1 600

1 650

1 700

1 750

1 800

1 850

1 900

1 950

2 000

2 060

2 120

2 180

2 240

2 300

11.7.2008

EN

Official Journal of the European Union

L 183/59

Load-capacity index

Corresponding maximum mass to be carried (kg)

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

2 360

2 430

2 500

2 575

2 650

2 725

2 800

2 900

3 000

3 075

3 150

3 250

3 350

3 450

3 550

3 650

3 750

3 875

4 000

4 125

4 250

4 375

4 500

4 625

4 750

4 875

5 000

5 150

5 300

5 450

5 600

5 800

6 000

6 150

6 300

6 500

6 700

6 900

7 100

7 300

L 183/60

EN

Official Journal of the European Union

11.7.2008

Load-capacity index

Corresponding maximum mass to be carried (kg)

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

7 500

7 750

8 000

8 250

8 500

8 750

9 000

9 250

9 500

9 750

10 000

10 300

10 600

10 900

11 200

11 500

11 800

12 150

12 500

12 850

13 200

13 600

14 000

11.7.2008

EN

Official Journal of the European Union

L 183/61

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 (*)

4.00R10 (*)

4.00R12 (*)
4.50R8 (*)

4.50R10 (*)

4.50R12 (*)
5.00R8 (*)

5.00R10 (*)

5.00R12 (*)
6.00R9

6.00R14C

6.00R16 (*)
6.50R10

6.50R14C

6.50R16 (*)
6.50R20 (*)

7.00R12

7.00R14C
7.00R15 (*)

7.00R16C

7.00R16

7.00R20
7.50R10

7.50R14C

7.50R15 (*)
7.50R16 (*)

7.50R17 (*)

7.50R20
8.25R15

8.25R16

8.25R17
8.25R20

9.00R15

9.00R16 (*)
9.00R20

10.00R15

10.00R20
10.00R22

11.00R16

2.50

3.00

3.00
3.50

3.50

3.50
3.00

3.50

3.50
4.00

4.50

4.50
5.00

5.00

4.50
5.00

5.00

5.00
5.00

5.50

5.50

5.50
5.50

5.50

6.00
6.00

6.00

6.00
6.50

6.50

6.50
6.50

6.00

6.50
7.00

7.50

7.50
7.50

6.50

203

254

305
203

254

305
203

254

305
229

356

406
254

356

406
508

305

356
381

406

406

508
254

356

381
406

432

508
381

406

432
508

381

406
508

381

508
559

406

414

466

517
439

490

545
467

516

568
540

626

728
588

640

742
860

672

650
746

778

784

892
645

686

772
802

852

928
836

860

886
962

840

414

466

517
439

490

545
467

516

568
540

625

730
588

650

748
—

672

668
752

778

774

898
645

692

772
806

852

928
836

860

895
970

840

912
1 018

918

1 052
1 102

980

900
1 012

918

1 050
1 102

952

107

108

108
125

125

125
132

134

134
160

158

170
177

170

176
181

192

180
197

198

198

198
207

195

212
210

210

210
230

230

230
230

249

246
258

275

275
275

279

107

108

108
125

125

128
132

134

137
160

158

170
177

172

176
—

192

182
198

198

198

198
207

192

212
210

210

213
234

234

234
234

249

252
256

275

275
275

272

L 183/62

EN

Official Journal of the European Union

11.7.2008

Tyre Size
Designation (+)

Measuring Rim
Width Code

Nominal Rim
Diameter d (mm)

11.00R20
11.00R22

11.00R24

12.00R20
12.00R22

12.00R24

13.00R20
14.00R20

14.00R24

16.00R20

80 Series
12/80 R 20

13/80 R 20

14/80 R 20
14/80 R 24

14.75/80 R 20

15.5/80 R 20

8.00
8.00

8.00

8.50
8.50

8.50

9.00
10.00

10.00

13.00

8.50

9.00

10.00
10.00

10.00

10.00

Wide Base Tyres for Multipurpose Trucks

7.50 R 18 MPT

10.5 R 18 MPT

10.5 R 20 MPT
12.5 R 18 MPT

12.5 R 20 MPT

14.5 R 20 MPT
14.5 R 24 MPT

5.50

9

9
11

11

11
11

508
559

610

508
559

610

508
508

610

508

508

508

508
610

508

508

457

457

508
457

508

508
610

Outer Diameter D (mm)

Section Width S (mm)

Radial

1 082
1 132

1 182

1 122
1 174

1 226

1 176
1 238

1 340

1 370

1 008

1 048

1 090
1 192

1 124

1 158

Diagonal

Radial

Diagonal

1 080
1 130

1 180

1 120
1 174

1 220

1 170
1 238

1 340

1 370

—

—

—
—

—

—

885

905

955
990

1 040

1 095
1 195

286
286

286

313
313

313

336
370

370

446

305

326

350
350

370

384

276

276
330

330

362
362

291
291

291

312
312

312

342
375

375

446

—

—

—
—

—

—

208

270

270
325

325

355
355

(+) Tyres in diagonal construction are identified by an hyphen in place of the letter ‘R’ (e.g. 5.00-8).
(*) The tyre size designation may be supplemented with the letter ‘C’ (e.g. 6.00-16C).

11.7.2008

EN

Official Journal of the European Union

L 183/63

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 (*)

7 R 19.5

8 R 17.5 (*)

8 R 19.5
8 R 22.5

8.5 R 17.5

9 R 17.5
9 R 19.5

9 R 22.5

9.5 R 17.5
9.5 R 19.5

10 R 17.5

10 R 19.5
10 R 22.5

11 R 22.5

11 R 24.5
12 R 22.5

13 R 22.5

15 R 19.5
15 R 22.5

16.5 R 19.5

16.5 R 22.5
18 R 19.5

18 R 22.5

70 Series
10/70 R 22.5

11/70 R 22.5

12/70 R 22.5
13/70 R 22.5

5.25

5.25

6.00

6.00
6.00

6.00

6.75
6.75

6.75

6.75
6.75

7.50

7.50
7.50

8.25

8.25
9.00

9.75

11.75
11.75

13.00

13.00
14.00

14.00

7.50

8.25

9.00
9.75

445

495

445

495
572

445

445
495

572

445
495

445

495
572

572

622
572

572

495
572

495

572
495

572

572

572

572
572

752

800

784

856
936

802

820
894

970

842
916

858

936
1 020

1 050

1 100
1 084

1 124

998
1 074

1 046

1 122
1 082

1 158

928

962

1 000
1 033

185

185

208

208
208

215

230
230

230

240
240

254

254
254

279

279
300

320

387
387

425

425
457

457

254

279

305
330

(*) The tyre size designation may be supplemented with the letter ‘C’ (e.g. 7 R 17.5C).

L 183/64

EN

Official Journal of the European Union

11.7.2008

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
145 R 12 C

145 R 13 C

145 R 14 C
145 R 15 C

155 R 12 C

155 R 13 C
155 R 14 C

165 R 13 C

165 R 14 C
165 R 15 C

175 R 13 C

175 R 14 C
175 R 16 C

185 R 13 C

185 R 14 C
185 R 15 C

185 R 16 C

195 R 14 C

195 R 15 C
195 R 16 C

205 R 14 C

205 R 15 C
205 R 16 C

215 R 14 C

215 R 15 C
215 R 16 C

245 R 16 C

17 R 15 C

17 R 380 C
17 R 400 C

19 R 400 C

Code Designated

5.60 R 12 C
6.40 R 13 C

6.70 R 13 C

6.70 R 14 C
6.70 R 15 C

4.00
4.00

4.00

4.00
4.00

4.50

4.50
4.50

4.50

4.50
4.50

5.00

5.00
5.00

5.50

5.50
5.50

5.50

5.50

5.50
5.50

6.00

6.00
6.00

6.00

6.00
6.00

7.00

5.00

5.00
150 mm

150 mm

4.00
5.00

5.00

5.00
5.00

254
305

330

356
381

305

330
356

330

356
381

330

356
406

330

356
381

406

356

381
406

356

381
406

356

381
406

406

381

381
400

400

305
330

330

356
381

492
542

566

590
616

550

578
604

596

622
646

608

634
684

624

650
674

700

666

690
716

686

710
736

700

724
750

798

678

678
698

728

570
648

660

688
712

—
—

—

—
—

—

—
—

—

—
—

—

—
—

—

—
—

—

—

—
—

—

—
—

—

—
—

798

—

—
—

—

572
640

662

688
714

147
147

147

147
147

157

157
157

167

167
167

178

178
178

188

188
188

188

198

198
198

208

208
208

218

218
218

248

178

178
186

200

150
172

180

180
180

—
—

—

—
—

—

—
—

—

—
—

—

—
—

—

—
—

—

—

—
—

—

—
—

—

—
—

248

—

—
—

—

148
172

180

180
180

(+) Tyres in diagonal construction are identified by an hyphen in place of the letter ‘R’ (e.g. 145-10 C).

11.7.2008

EN

Official Journal of the European Union

L 183/65

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

16×6-8
18×7

18×7-8

21×8-9
21×4

22×4 1/2

23×5
23×9-10

25×6

27×10-12
28×9-15

Metric designated

200-15

250-15

300-15

3.25

4.33
4.33

4.33

6.00
2.32

3.11

3.75
6.50

3.75

8.00
7.00

6.50

7.50

8.00

203

203
203

203

229
330

330

330
254

330

305
381

381

381

381

385

425
462

462

535
565

595

635
595

680

690
707

730

735

840

122

152
173

173

200
113

132

155
225

170

255
216

205

250

300

(+) Tyres in radial construction are identified by the letter ‘R’ in place of the hyphen ‘-’ (e.g. 15×4 1/2 R 8).

L 183/66

EN

Official Journal of the European Union

11.7.2008

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)

Normal

Snow

Section width
S (mm) (3)

6.00-16LT

6.50-16LT
6.70-16LT

7.00-13LT

7.00-14LT
7.00-15LT

7.00-16LT

7.10-15LT
7.50-15LT

7.50-16LT

8.25-16LT
9.00-16LT

G78-15LT

H78-15LT

L78-15LT
L78-16LT

7-14.5LT (4)
8-14.5LT (4)
9-14.5LT (4)
7-17.5LT
8-17.5LT

4.50

4.50
5.00

5.00

5.00
5.50

5.50

5.00
6.00

6.00

6.50
6.50

6.00

6.00

6.50
6.50

6.00
6.00

7.00

5.25
5.25

406

406
406

330

356
381

406

381
381

406

406
406

381

381

381
406

368
368

368

445
445

732

755
722

647

670
752

778

738
782

808

859
890

711

727

749
775

677
707

711

758
788

743

767
733

658

681
763

788

749
794

819

869
903

722

739

760
786

769
799

(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).

173

182
191

187

187
202

202

199
220

220

241
257

212

222

236
236

185
203

241

189
199

11.7.2008

EN

Official Journal of the European Union

L 183/67

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)

Normal

Snow

Section width
S (mm) (3)

9-15LT
10-15LT

11-15LT

24×7.50-13LT
27×8.50-14LT

28×8.50-15LT

29×9.50-15LT
30×9.50-15LT

31×10.50-15LT

31×11.50-15LT
31×13.50-15LT

31×15.50-15LT

32×11.50-15LT
33×12.50-15LT

35×12.50-15LT

37×12.50-15LT
37×14.50-15LT

8.00-16.5LT

8.75-16.5LT

9.50-16.5LT
10-16.5LT

12-16.5LT

30×9.50-16.5LT

31×10.50-16.5LT
33×12.50-16.5LT

37×12.50-16.5LT

37×14.50-16.5LT
33×9.50 R15LT

35×12.50 R16.5LT

37×12.50 R17LT

8.00
8.00

8.00

6
7

7

7.5
7.5

8.5

9
11

12

9
10

10

10
12

6.00

6.75

6.75
8.25

9.75

7.50

8.25
9.75

9.75

11.25
7.50

10.00

10.00

381
381

381

330
356

381

381
381

381

381
381

381

381
381

381

381
381

419

419

419
419

419

419

419
419

419

419
381

419

432

744
773

777

597
674

699

724
750

775

775
775

775

801
826

877

928
928

720

748

776
762

818

750

775
826

928

928
826

877

928

755
783

788

604
680

705

731
756

781

781
781

781

807
832

883

934
934

730

759

787
773

831

761

787
838

939

939
832

883

934

(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.

254
264

279

191
218

218

240
240

268

290
345

390

290
318

318

318
372

203

222

241
264

307

240

266
315

315

365
240

318

318

L 183/68

EN

Official Journal of the European Union

11.7.2008

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)

6.50-20
7.00-15TR

7.00-18

7.00-20
7.50-15TR

7.50-17

7.50-18
7.50-20

8.25-15TR

8.25-20
9.00-15TR

9.00-20

10.00-15TR

10.00-20
10.00-22

11.00-20

11.00-22
11.00-24

11.50-20

12.00-20
12.00-24

14.00-20

14.00-24

5
5.5

5.5

5.5
6

6

6
6

6.5

6.5
7

7

7.5

7.5
7.5

8

8
8

8

8.5
8.5

10

10

508
381

457

508
381

432

457
508

381

508
381

508

381

508
559

508

559
610

508

508
610

508

610

(a)

878
777

853

904
808

859

884
935

847

974
891

1 019

927

1 054
1 104

1 085

1 135
1 186

1 085

1 125
1 226

1 241

1 343

Outer diameter D (mm) (2)

Normal

(b)

855

982
904

1 031

940

1 067
1 118

1 099

1 150
1 201

1 099

Snow

893
792

868

919
825

876

901
952

865

992
911

1 038

946

1 073
1 123

1 104

1 155
1 206

1 104

1 146
1 247

1 266

1 368

Section width
S (mm) (3)

184
199

199

199
215

215

215
215

236

236
259

259

278

278
278

293

293
293

296

315
315

375

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.

11.7.2008

EN

Official Journal of the European Union

L 183/69

Table D

Code designated tyres for special services

Diagonal and radial

Tyre size designation

Measuring rim
width code

Nominal rim
diameter d (mm)

10.00-20ML
11.00-22ML

13.00-24ML

14.00-20ML
14.00-24ML

15-19.5ML

24 R 21

7.5
8

9

10
10

11.75

18

508
559

610

508
610

495

533

(1) Coefficient ‘b’ for the calculation of Dmax: 1,06.

Category of use: special (a) Traction tread (b) Heavy tread

(2) Overall width may exceed this value up to +8 per cent.

Outer diameter D (mm) (1)

(a)

1 073
1 155

1 302

1 266
1 368

1 019

1 372

(b)

1 099
1 182

—

Section width
S (mm) (2)

278
293

340

375
375

389

610

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)

8-19.5
8-22.5

9-22.5

10-22.5
11-22.5

11-24.5

12-22.5

12-24.5
12.5-22.5

12.5-24.5

14-17.5
15-19.5

15-22.5

16.5-22.5
18-19.5

18-22.5

6.00
6.00

6.75

7.50
8.25

8.25

9.00

9.00
9.00

9.00

10.50
11.75

11.75

13.00
14.00

14.00

495
572

572

572
572

622

572

622
572

622

445
495

572

572
495

572

Outer diameter D (mm) (2)

Normal

(b)

982

1 031
1 067

1 118

1 099

1 150
1 099

1 150

(a)

859
935

974

1 019
1 054

1 104

1 085

1 135
1 085

1 135

907
1 005

1 082

1 128
1 080

1 158

Snow

876
952

992

1 038
1 073

1 123

1 104

1 155
1 104

1 155

921
1 019

1 095

1 144
1 096

1 172

Section width
S (mm) (3)

203
203

229

254
279

279

300

300
302

302
349 (—)
389 (—)
389 (—)
425 (—)
457 (—)
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.

Category of use: Normal Service tyres: (a) Highway tread (b) Heavy tread

(3) Overall width may exceed this value up to +6 per cent

(—) Overall width may exceed this value up to +5 per cent.

L 183/70

EN

Official Journal of the European Union

11.7.2008

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.

11.7.2008

EN

Official Journal of the European Union

L 183/71

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.

L 183/72

EN

Official Journal of the European Union

11.7.2008

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.

11.7.2008

EN

Official Journal of the European Union

L 183/73

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

121 or less

F

G

J

K

L

M

F

G

J

K

L

M

N

P

100

125

150

175

200

225

100

125

150

175

200

250

275

300

100

100

125

150

—

—

100

125

150

175

175

200

—

—

66 %

84 %

101 %

70 %
4 h.

75 %

75 %

75 %

88 %
6 h.

97 %

97 %

97 %

106 %

114 %

114 %

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.

L 183/74

EN

Official Journal of the European Union

11.7.2008

Appendix 2

Relation between the pressure index and the units of pressure

Pressure Index (‘PSI’)

20
25

30

35
40

45

50
55

60

65
70

75

80
85

90

95
100

105

110

115
120

125

130
135

140

145
150
…

Bar

1,4
1,7

2,1

2,4
2,8

3,1

3,4
3,8

4,1

4,5
4,8

5,2

5,5
5,9

6,2

6,6
6,9

7,2

7,6

7,9
8,3

8,6

9,0
9,3

9,7

10,0
10,3
…

kPa

140
170

210

240
280

310

340
380

410

450
480

520

550
590

620

660
690

720

760

790
830

860

900
930

970

1 000
1 030
…

11.7.2008

EN

Official Journal of the European Union

L 183/75

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)

All load indices

Load indices ≥ 122 (1)

Load indices ≤ 121 (1)

Speed (km/h)

Speed category symbol

Speed category symbol

Speed category symbol

F

G

J

K

L

M

L

M

N

P (2)

0

5

10

15

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

105

110

115

120

125

130

135

140

145

150

155

160

+ 150

+ 110

+ 150

+ 110

+ 150

+ 110

+ 150

+ 110

+ 150

+ 110

+ 150

+ 110

+ 80

+ 65

+ 50

+ 35

+ 25

+ 19

+ 15

+ 13

+ 12

+ 11

+ 10

+ 7,5

+ 5,0

+ 2,5

0
– 3
– 6
– 10
– 15

+ 80

+ 65

+ 50

+ 35

+ 25

+ 19

+ 15

+ 13

+ 12

+ 11

+ 10

+ 8,5

+ 7,0

+ 5,5

+ 4,0

+ 2,0

0
– 2,5
– 5
– 8
– 13

+ 80

+ 65

+ 50

+ 35

+ 25

+ 19

+ 15

+ 13

+ 12

+ 11

+ 10

+ 8,5

+ 7,0

+ 5,5

+ 4,0

+ 3,0

+ 2,0

+ 1,0

0
– 2
– 4
– 7
– 12

+ 80

+ 65

+ 50

+ 35

+ 25

+ 19

+ 15

+ 13

+ 12

+ 11

+ 10

+ 8,5

+ 7,0

+ 5,5

+ 4,0

+ 3,0

+ 2,0

+ 1,0

0

0

0
– 3
– 7

+ 80

+ 65

+ 50

+ 35

+ 25

+ 19

+ 15

+ 13

+ 12

+ 11

+ 10

+ 8,5

+ 7,0

+ 5,5

+ 4,0

+ 3,0

+ 2,0

+ 1,0

0

0

0

0

0

+ 80

+ 65

+ 50

+ 35

+ 25

+ 19

+ 15

+ 13

+ 12

+ 11

+ 10

+ 8,5

+ 7,0

+ 5,5

+ 4,0

+ 3,0

+ 2,0

+ 1,0

0

0

0

0

0

0

0

+ 110

+ 110

+ 110

+ 110

+ 90

+ 75

+ 60

+ 50

+ 42

+ 35

+ 29

+ 25

+ 22

+ 20

+ 90

+ 75

+ 60

+ 50

+ 42

+ 35

+ 29

+ 25

+ 22

+ 20

+ 90

+ 75

+ 60

+ 50

+ 42

+ 35

+ 29

+ 25

+ 22

+ 20

+ 17,5

+ 17,5

+ 17,5

+ 15,0

+ 15,0

+ 15,0

+ 13,5

+ 13,5

+ 13,5

+ 12,5

+ 12,5

+ 12,5

+ 11,0

+ 11,0

+ 11,0

+ 10,0

+ 10,0

+ 10,0

+ 8,5

+ 7,5

+ 6,5

+ 5,0

+ 8,5

+ 7,5

+ 6,5

+ 5,0

+ 8,5

+ 7,5

+ 6,5

+ 5,0

+ 90

+ 75

+ 60

+ 50

+ 42

+ 35

+ 29

+ 25

+ 22

+ 20

+ 17,5

+ 15,0

+ 13,5

+ 12,5

+ 11,0

+ 10,0

+ 8,5

+ 7,5

+ 6,5

+ 5,0

+ 3,75

+ 3,75

+ 3,75

+ 3,75

+ 2,5

+ 2,5

+ 2,5

+ 2,5

+ 1,25

+ 1,25

+ 1,25

+ 1,25

0
– 2,5
– 5,0
– 7,5
– 10

0

0

0
– 2,5
– 5
– 7,5
– 10,0

0

0

0

0

0
– 2,5
– 5,0
– 7,5
– 10,0

0

0

0

0

0

0

0
– 2,5
– 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 corre-

sponding to the speed category symbol (see paragraph 2.28.2) specifies the maximum speed permitted for the tyre.

L 183/76

EN

Official Journal of the European Union

11.7.2008

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.

2.

3.

Manufacturer’s name or trademark on the tyre:

...........................................................................................................................

Manufacturer’s tyre type, model or design designation:

..............................................................................................................

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:

....................................................................................................................................................................................................