Regulation No 30 of the Economic Commission for Europe of the United Nations (UN/ECE) — Uniform provisions concerning the approval of pneumatic tyres for motor vehicles and their trailers
Date: 2008-07-30
Institutions: United Nations Economic Commission for Europe
Subjects: approval, commercial vehicle, motor car, pneumatic tyre, technical regulations, technical standard

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ACTS ADOPTED BY BODIES CREATED BY INTERNATIONAL AGREEMENTS

Only the original UN/ECE texts have legal effect under international public law. The status and date of entry into force of this Regulation
should be checked in the latest version of the UN/ECE status document TRANS/WP.29/343, available at:
http://www.unece.org/trans/main/wp29/wp29wgs/wp29gen/wp29fdocstts.html

Regulation No 30 of the Economic Commission for Europe of the United Nations (UN/ECE) —
Uniform provisions concerning the approval of pneumatic tyres for motor vehicles and their
trailers

Incorporating all valid text up to:

Revision 3

Supplement 15 to the 02 series of amendments — Date of entry into force: 10 November 2007

CONTENTS

REGULATION

1. Scope

2. Definitions

3. Markings

4. Application for approval

5. Approval

6. Requirements

7. Modifications of the type of pneumatic tyre and extension of approval

8. Conformity of production

9. Penalties for non-conformity of production

10. Production definitively discontinued

11. Transitional provisions

12. 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 30

Annex II — Example of the arrangement of the approval mark
Annex III — Arrangement of tyre markings
Annex IV — Load-capacity indices
Annex V — Tyre size designation and dimensions
Annex VI — Method of measuring pneumatic tyres
Annex VII — Procedure for load/speed performance tests

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1.

SCOPE

This Regulation covers new pneumatic tyres designed primarily, but not only, for vehicles in
categories M1, O1 and O2 (1).

It does not apply to tyres designed for

(a) the equipment for vintage cars

(b) competitions.

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 (ordinary (road-type) or snow tyre or for temporary use);

2.1.4.

Structure (diagonal (bias-ply), bias-belted, radial-ply, run flat tyre);

2.1.5.

Speed category symbol;

2.1.6.

Load-capacity index;

2.1.7.

Tyre cross section;

2.2.

2.3.

2.3.1.

2.3.2.

‘Snow tyre’ means a tyre whose tread pattern and whose structure are primarily designed to
ensure in mud and fresh or melting snow a performance better than that of an ordinary (road-
type) tyre. The tread pattern of a snow tyre generally consists of groove (rib) and/or solid-block
elements more widely spaced than on an ordinary (road-type) tyre;

‘Structure’ of a pneumatic tyre means the technical characteristics of the tyre's carcass. The
following structures are distinguished 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 of substantially less than 90 ° to the centre line of the
tread;

‘Bias-belted’ describes a pneumatic-tyre structure of diagonal (bias-ply) type in which the carcass
is restricted by a belt comprising two or more layers of substantially inextensible cord material
laid at alternate angles close to those of the carcass;

(1) As defined in Annex VII to the Consolidated Resolution on the Construction of Vehicles (R.E.3), (document TRANS/

WP.29/78/Rev.1/Amend.2 as last amended by Amend.4).

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2.3.3.

2.3.4.

2.3.5.

2.3.6.

2.3.7.

2.4.

2.5.

2.6.

2.7.

2.8.

2.9.

‘Radial’ describes a pneumatic-tyre structure in which the ply cords extend to the beads and are
laid substantially at 90 ° to the centre line of the tread, the carcass being stabilised by an
essentially inextensible circumferential belt;

‘Reinforced’ or ‘Extra Load’ describes a pneumatic-tyre structure in which the carcass is more
resistant than that of the corresponding standard tyre;

‘Temporary use spare tyre’ means a tyre different from a tyre intended to be fitted to any
vehicle for normal driving conditions but intended only for temporary use under restricted
driving conditions;

‘T-type temporary use spare tyre’ means a type of temporary use spare tyre designed for use at
inflation pressures higher than those established for standard and reinforced tyres;

‘Run flat tyre’ or ‘Self supporting tyre’ describes a pneumatic tyre structure provided with any
technical solutions (for example, reinforced sidewalls, etc.) allowing the pneumatic tyre,
mounted on the appropriate wheel and in the absence of any supplementary component, to
supply the vehicle with the basic tyre functions, at least, at a speed of 80 km/h (50 mph) and a
distance of 80 km when operating in flat tyre running mode.

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

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

‘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 side walls
which, when inflated, bears the load (1);

‘Tread’ means that part of a pneumatic tyre which comes into contact with the ground (1);

‘Sidewall’ means the part of a pneumatic tyre between the tread and the bead (1);

2.10.

‘Lower area of tyre’ means the area included between the point of maximum section width of
the tyre and the area designed to be covered by the edge of the rim (1);

2.10.1.

However, in case of tyres identified by the ‘tyre to rim fitment configuration’ (see para. 3.1.10)
symbol ‘A’ or ‘U’, it means the area of the tyre which is seating on the rim.

2.11.

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

2.12.

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

(1) See explanatory figure.

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2.13.

2.14.

2.15.

‘Overall width’ means the linear distance between the outsides of the side walls of an inflated
pneumatic tyre, including labelling (marking), decoration and protective bands or ribs (1);

‘Section height’ means a distance equal to half the difference between the outer diameter of the
tyre and the nominal rim diameter (1);

‘Nominal aspect ratio (Ra)’ means the centuple of the number obtained by dividing the number
expressing the section height in mm by the number expressing the nominal section width in
mm;

2.16.

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

2.17.

‘Tyre-size designation’ is

2.17.1.

a designation showing:

2.17.1.1.

the nominal section width. This width must be expressed in mm, except in the case of the 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 denoting the nominal rim diameter and corresponding to its diameter
expressed either by codes (numbers below 100) or in millimetres (numbers above 100);

2.17.1.4.

the letter ‘T’ in front of the nominal section width in case of T-type temporary use spare tyres;

2.17.1.5.

an indication of the tyre to rim fitment configuration when it differs from the standard
configuration.

2.18.

2.19.

2.19.1.

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

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

‘Tyre to rim fitment configuration’ means the type of rim to which the tyre is designed to be
fitted. In the case of non-standard rims this will be identified by a symbol applied to the tyre,
for example, ‘CT’, ‘TR’, ‘TD’, ‘A’ or ‘U’.

2.20.

‘Theoretical rim’ means the notional 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 that tyre;

2.21.

‘Measuring rim’ means the rim on which a tyre is required to be fitted for size measurements;

2.22.

‘Test rim’ means the rim on which a tyre is required to be fitted for testing;

2.23.

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

(1) See explanatory figure.

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2.24.

‘Cord separation’ means the parting of the cords from their rubber 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.

2.28.

2.29.

‘Tread-wear indicators’ means the projections within the tread grooves designed to give a visual
indication of the degree of wear of the tread;

‘Load-capacity index’ means a number associated to the reference mass a tyre can carry when
operated in conformity with requirements governing utilization specified by the manufacturer.

‘Speed category’ means the maximum speed which the tyre can sustain, expressed by speed
category symbol (see table below).

2.29.1.

The categories of speed are those indicated in the table below:

Speed-category symbol

Maximum speed
(km/h)

L

M

N

P

Q

R

S

T

U

H

V

W

Y

120

130

140

150

160

170

180

190

200

210

240

270

300

2.30.

Tread pattern grooves

2.30.1.

‘Principal grooves’ means the wide grooves positioned in the central zone of the tyre tread,
which have the tread-wear indicators (see para. 2.27) located inside them.

2.30.2.

‘Secondary grooves’ means the supplementary grooves of
disappear in the course of the tyre's life.

the tread pattern which may

2.31.

‘Maximum load rating’ means the maximum mass the tyre is rated to carry;

2.31.1.

for speed not exceeding 210 km/h the maximum load rating shall not exceed the value
associated with the load capacity index of the tyre;

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2.31.2.

for speed higher than 210 km/h, but not exceeding 240 km/h, (tyres classified with speed
category symbol ‘V’) the maximum load rating shall not exceed the percentage of the value
associated with the load capacity index of the tyre, indicated in the table below, with reference
to the speed capability of the car to which the tyre is fitted.

Maximum speed
(km/h)

Maximum load rating
(%)

215

220

225

230

235

240

98,5

97

95,5

94

92,5

91

For intermediate maximum speeds linear interpolations of
allowed.

the maximum load rating are

2.31.3.

For speeds higher than 240 km/h (tyres classified with speed category symbol
the
maximum load rating shall not exceed the percentage of the value associated with the load-
capacity index of the tyre, indicated in the table below, with reference to the speed capability of
the car to which the tyre is fitted.

‘W’)

Maximum speed
(km/h)

Maximum load rating
(%)

240

250

260

270

100

95

90

85

For intermediate maximum speeds linear interpolations of
allowed.

the maximum load rating are

2.31.4.

For speeds higher than 270 km/h (tyres classified with speed-category symbol ‘Y’) the maximum
load rating shall not exceed the percentage of the value associated with the load-capacity index
of the tyre, indicated in the table below, with reference to the speed capability of the car to
which the tyre is fitted.

Maximum speed
(km/h)

Maximum load rating
(%)

270

280

290

300

100

95

90

85

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For intermediate maximum speeds linear interpolations of
allowed.

the maximum load rating are

2.31.5.

For speeds lower or equal
to 60 km/h the maximum load rating must not exceed the
percentage of mass, associated with the load-capacity index of the tyre indicated in the table
below with reference to the maximum design speed of the vehicle to which the tyre is to be
fitted.

Maximum speed
(km/h)

Maximum load rating
(%)

25

30

40

50

60

142

135

125

115

110

2.31.6.

For speeds in excess of 300 km/h, the maximum load rating must not exceed the mass
specified by the tyre manufacturer with reference to the speed capacity of the tyre. For inter­
mediate speeds between 300 km/h and the maximum speed permitted by the tyre manu­
facturer, a linear interpolation of the maximum load rating applies.

2.32.

2.33.

2.34.

2.35.

3.

3.1.

‘Flat tyre running mode’ describes the state of the tyre, essentially maintaining its structural
integrity, while operating at an inflation pressure between 0 and 70 kPa.

‘Basic tyre functions’ means the normal capability of an inflated tyre in supporting a given load
up to a given speed and transmitting the driving, the steering and the braking forces to the
ground on which it runs.

‘Run flat system’ or ‘Extended mobility system’ describes an assembly of specified functionally
including a tyre, which together provide the specified performance
dependant components,
granting the vehicle with the basic tyre functions, at least, at a speed of 80 km/h (50 mph) and
a distance of 80 km when operating in flat tyre running mode.

‘Deflected section height’
is the difference between the deflected radius, measured from the
centre of the rim to the surface of the drum, and one half the nominal rim diameter as defined
in ISO 4000-1.

MARKINGS

Pneumatic tyres submitted for approval shall bear on both side walls in the case of symmetrical
tyres and at least on the outer side wall in the case of asymmetrical tyres:

3.1.1.

The trade name or 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 marking or the letter ‘D’ placed in front of the rim diameter
marking;

3.1.3.2.

on radial-ply tyres, the letter ‘R’ placed in front of the rim-diameter marking, and, optionally,
the word ‘RADIAL’;

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3.1.3.3.

on bias-belted tyres, the letter ‘B’ placed in front of the rim-diameter marking, and in addition
the words ‘BIAS-BELTED’;

3.1.3.4.

on radial ply tyres suitable for speeds in excess of 240 km/h but not exceeding 300 km/h (tyres
marked with the speed symbol ‘W’ or ‘Y’ as part of the service description), the letter ‘R’, placed
before the rim diameter code marking, may be replaced with the inscription ‘ZR’.

3.1.3.5.

on ‘run flat’ or ‘self supporting’ tyres the letter ‘F’ placed in front of the rim diameter marking.

3.1.4.

An indication of the tyre's speed category by means of the symbol shown in paragraph 2.29.
above;

3.1.4.1.

On tyres suitable for speeds in excess of 300 km/h, the letter ‘R’ placed in front of the rim
diameter code marking shall be replaced by the inscription ‘ZR’ and the tyre shall be marked
with a service description consisting of the speed symbol ‘Y’ and the corresponding load index.
The service description shall be marked within brackets, for example, ‘(95Y)’.

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 index as defined in paragraph 2.28 of this Regulation;

3.1.7.

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

3.1.8.

The word ‘REINFORCED’ or the words ‘EXTRA LOAD’ if the tyre is a reinforced tyre;

3.1.9.

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 may be placed on one
sidewall only, shall not be mandatory, on any tyre submitted for approval, until two years after
the date of entry into force of this Regulation (1).

3.1.10.

In the case of tyres first approved after the entry into force of Supplement 13 to the 02 series
of amendments to Regulation No 30, the identification referred to in paragraph 2.17.1.5 shall
be placed immediately after the rim diameter marking referred to in paragraph 2.17.1.3.

3.1.11.

In the case of temporary use spare tyres, the words ‘TEMPORARY USE ONLY’ in upper case
characters at least 12,7 mm high.

(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.

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3.1.11.1.

In addition, in the case of ‘T’ type temporary use spare tyres, the legend ‘INFLATE TO 420 kPa
(60 psi)’, the upper case characters being at least 12,7 mm high.

3.1.12.

The symbol below if the tyre is a ‘run flat’ or ‘self supporting’ tyre, where ‘h’ is at least 12 mm.

3.2.

Tyres shall provide adequate space for the approval mark, as shown in Annex II to this
Regulation.

3.3.

Annex III to this Regulation gives an example of the 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
situated in the lower area of the tyre on at least one of its side walls, except for the inscription
mentioned in paragraph 3.1.1 above.

3.4.1.

However, for tyres identified by the ‘tyre to rim fitment configuration’
(see para. 3.1.10),
symbol ‘A’ or ‘U’, the markings may be placed anywhere on the outside sidewall of the tyre.

4.

4.1.

APPLICATION FOR APPROVAL

The application for approval of a type of pneumatic tyre shall be submitted by the holder of
the trade name or mark or by his duly accredited representative. It shall specify:

4.1.1.

The tyre-size designation as defined in paragraph 2.17 of this Regulation;

4.1.2.

The trade name or mark;

4.1.3.

The category of use (ordinary (road-type) or snow-tyre, or for temporary use);

4.1.4.

Structure: diagonal (bias ply), bias belted, radial, run flat tyre;

4.1.5.

The speed category;

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4.1.6.

The load-capacity index of the tyre;

4.1.7.

Whether the tyre is to be used with or without an inner tube;

4.1.8.

Whether the tyre is ‘standard’ or ‘reinforced’ or ‘T-type temporary use spare tyre’;

4.1.9.

The ply-rating number of diagonal (bias-ply) tyres;

4.1.10.

The overall dimensions: overall section width and outer diameter;

4.1.11.

The rims on which the tyre can be mounted;

4.1.12.

The measuring rim and test rim;

4.1.13.

The test pressure where the manufacturer requests the application of Annex VII, paragraph 1.3
to this Regulation;

4.1.14.

The factor x referred to in paragraph 2.20 above.

4.1.15.

For tyres suitable for speeds in excess of 300 km/h, the maximum speed permitted by the tyre
manufacturer and the load carrying capacity allowed for that maximum speed. The tyre manu­
facturer must also specify these values in the technical literature for the tyre type.

4.1.16.

The identification of the bead retention rim contours specific for the ‘flat tyre running mode’ of
‘run flat tyres’.

4.2.

4.3.

4.4.

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.

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5.

5.1.

5.2.

5.3.

5.3.1.

5.4.

APPROVAL

If the pneumatic tyre submitted for approval
requirements of paragraph 6 below, approval of that type of tyre shall be granted.

in pursuance of this Regulation meets the

indicate the series of amendments incorporating the most

An approval number shall be assigned to each type approved. Its first two digits (at present 02)
shall
technical
amendments made to the Regulation at the time of issue of the approval. The same Contracting
Party shall not assign the same number to another tyre type covered by this Regulation.

recent major

Notice of approval or of extension or refusal or withdrawal of approval or production definiti-
vely discontinued of a type of pneumatic tyre pursuant to this Regulation shall be com-
municated to the Parties to the 1958 Agreement applying this Regulation, by means of a
form conforming to the model in Annex I to this Regulation.

Where type approval
is granted for a tyre type suitable for speeds over 300 km/h (see
paragraph 4.1.15), the relevant maximum speed (km/h) and the load carrying capacity (kg)
allowed for the maximum speed shall be notified in clear in section 10 of the communication
form (see Annex I to this Regulation); load carrying capacities for intermediate speeds higher
than 300 km/h may also be specified.

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);

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.

(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, 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, 48 for New
Zealand, 49 for Cyprus, 50 for Malta, 51 for the Republic of Korea, 52 for Malaysia, 53 for Thailand, 54 and 55
(vacant) and 56 for Montenegro. 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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6.

6.1.

REQUIREMENTS

Dimensions of tyres

6.1.1.

Section width of a tyre

6.1.1.1.

The section width shall be calculated by the following formula:

S = S1 + K(A – A1),

where:

S = is the ‘section width’ expressed in mm and measured on the measuring rim;

S1 = is the ‘nominal section width’ (in mm) as shown on the side wall of the tyre in the

designation of the tyre as prescribed;

A = is the width (expressed in mm) of the measuring rim, as shown by the manufacturer in

the descriptive note (1);

A1 = is the width (expressed in mm) of the theoretical rim.

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 types of tyres for which the designation is given in the first column of the
tables in Annex V to this Regulation, the section width shall be that given opposite the tyre
designation in these tables.

6.1.1.3.

However, for tyres identified by the ‘tyre to rim fitment configuration’ (see para. 3.1.10) symbol
‘A’ or ‘U’, K shall be taken equal to 0,6.

6.1.2.

Outer diameter of a tyre

6.1.2.1.

The outer diameter of a tyre shall be calculated by the following formula:

D = d + 2H

where:

D is the outer diameter expressed in mm,

d is the conventional number defined in paragraph 2.17.1.3 above, expressed in mm (1),

H is the nominal section height in mm, equal to:

H = 0,01S1 × Ra,

S1 is the nominal section width in mm, and

(1) When the conventional number is given by codes, the value in mm is obtained by multiplying such number by 25,4.

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Ra is the nominal aspect ratio,

all as shown on the sidewall of the tyre in the tyre-size designation in conformity with the
requirements of paragraph 3.4 above.

6.1.2.2.

However, for the types of tyres for which the designation is given in the first column of the
tables of Annex V to this Regulation the outer diameter shall be that given opposite the ‘size’
designation in these tables.

6.1.2.3.

However, for tyres identified by the ‘tyre to rim fitment configuration’ (see para. 3.1.10) symbol
‘A’ or ‘U’, 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 determined pursuant to
paragraph 6.1.1. above.

6.1.4.2.

It may exceed that value by the following percentages:

6.1.4.2.1.

in diagonal (bias-ply) tyres: 6 per cent;

6.1.4.2.2.

in radial ply, run flat tyres: 4 per cent;

6.1.4.2.3.

in addition, if the tyre has special protective ribs (or bands), the figure as increased by the above
tolerance may be exceeded by 8 mm.

6.1.4.2.4. However, for tyres identified by the ‘tyre to rim fitment configuration’ (see para. 3.1.10) symbol
‘A’ or ‘U’, 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 20 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 para. 3.1.10) symbol ‘A’ or ‘U’, the nominal section height H is equal to:

H = 0,5 (D – d), for references see paragraph 6.1.2.

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Official Journal of the European Union

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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’ = 0,97

6.1.5.3.2. Coefficient ‘b’ for ordinary (road type)

tyres

Radial, Run flat tyre
1,04

Diagonal and Bias Belted
1,08

6.1.5.4.

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

6.2.

6.2.1.

6.2.1.1.

Load/speed performance test

The pneumatic tyre shall undergo a load/speed performance test carried out by the procedure
described in Annex VII to this Regulation.

Where application is made for tyres identified by means of letter code ‘ZR’ within the size
designation and suitable for speeds over 300 km/h (see paragraph 4.1.15), the above load/speed
test is carried out on one tyre at the load and speed conditions marked on the tyre (see
paragraph 3.1.4.1). Another load/speed test must be carried out on a second sample of the
same tyre type at the load and speed conditions specified as maximum by the tyre manu­
facturer (see paragraph 4.1.15 to this Regulation).

The second test may be carried out on the same tyre sample if the tyre manufacturer agrees.

6.2.1.2.

Where application is made for the type approval of a ‘run flat system’ the above load speed test
is carried out on one tyre, inflated as per paragraph 1.2 of Annex VII, at the load and speed
conditions marked on the tyre (see paragraph 3.1.4.1). Another load/speed test must be carried
out on a second sample of the same tyre type as specified in paragraph 3. of Annex VII. The
second test may be carried out on the same sample if the manufacturer agrees.

6.2.2.

A tyre which after undergoing the load/speed test does not exhibit any tread separation, ply
separation, cord separation, chunking or broken cords shall be deemed to have passed the test.

6.2.2.1.

However, a tyre marked with the speed symbol ‘Y’ which, after undergoing the relevant test,
exhibits superficial blistering of the tyre tread caused by the specific test equipment and
conditions, is deemed to have passed the test.

6.2.2.2.

If a ‘run flat system’ tyre which, after undergoing the test as specified in paragraph 3 of Annex
VII, does not exhibit a change in the deflected section height, compared to the deflected section
height at the start of the test, higher than 20 per cent and retains the tread connected to the
two sidewalls, it is deemed to have passed the test.

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6.2.3.

The outer diameter of the tyre, measured six hours after the load/speed performance test, must
not differ by more than ± 3,5 per cent from the outer diameter as measured before the test.

6.3.

6.3.1.

Tread-wear indicators

The pneumatic tyre shall include not less than six transverse rows of wear indicators, approxi­
mately equally spaced and situated in the principal grooves of the tread. The tread-wear
indicators shall be such that they cannot be confused with the rubber ridges between the
ribs or blocks of the tread.

6.3.2.

However, in the case of tyres of dimensions appropriate for mounting on rims of a nominal
diameter of 12 or less, four rows of tread-wear indicators shall be accepted.

6.3.3.

6.3.4.

7.

7.1.

The tread-wear indicators must provide a means of indicating, with a tolerance of + 0,60/– 0,00
mm, when the tread grooves are no longer more than 1,6 mm deep.

The height of tread-wear indicators is determined by measuring the difference between the
depth, from the tread's surface, to the top of the tread-wear indicator and to the bottom of the
tread groove close to the slope at the base of the tread-wear indicator.

MODIFICATIONS OF THE TYPE OF PNEUMATIC TYRE AND EXTENSION OF APPROVAL

Every modification of the type of pneumatic tyre shall be notified to the Administrative
Department which approved the type of pneumatic tyre. The department may then either:

7.1.1.

Consider that the modifications made are unlikely to have an appreciable adverse effect and that
in any case, the pneumatic tyre still complies with the requirements; or

7.1.2.

Require a further test report from the Technical Service responsible for conducting the tests.

7.2.

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
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.

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Official Journal of the European Union

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8.2.

9.

9.1.

9.2.

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 at least 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 requirements laid down in paragraph 8.1 above are not complied with or if
the tyres taken from the series have failed to pass the tests prescribed in that paragraph.

If a Contracting Party to the Agreement applying this Regulation withdraws an approval it has
previously granted,
it shall forthwith so notify the other Contracting Parties applying this
Regulation by means of a communication form conforming to the model in Annex I to this
Regulation.

10.

PRODUCTION DEFINITIVELY DISCONTINUED

If the holder of an approval completely ceases to manufacture a type of pneumatic tyre
approved in accordance with this Regulation, he shall so inform the authority which granted
the approval. Upon receiving the relevant communication that authority shall inform thereof
the other Parties to the 1958 Agreement applying this Regulation by means of a communi­
cation form conforming to the model in Annex I to this Regulation.

11.

11.1.

TRANSITIONAL PROVISIONS

Contracting Parties applying this Regulation shall not refuse to grant extensions of approval to
preceding series of amendments, or supplement to series of amendments to this Regulation.

11.2.

No Contracting Parties applying this Regulation shall refuse a tyre approved to the 01 series of
amendments to this Regulation.

11.3.

Tread-wear indicators:

11.3.1.

As from the date of entry into force of Supplement 4 to the 02 series of amendments,
Contracting Parties applying this Regulation may no longer issue approvals pursuant
to
Supplement 3 to the 02 series of amendments with respect
to the requirements of
paragraph 6.3.3.

11.3.2.

All new tyres manufactured from 1 October 1995 shall conform to the requirements of
paragraph 6.3.3 as amended by Supplement 4 to the 02 series of amendments.

12.

12.1.

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

The Parties to the 1958 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 of the Administrative Departments which grant approval and to
which forms certifying approval, or extension, or refusal or withdrawal of approval or
production definitively discontinued, issued in other countries, are to be sent.

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Official Journal of the European Union

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12.2.

12.3.

The Parties to the Agreement which apply this Regulation may designate laboratories of tyre
manufacturers as approved test laboratories.

Where a Party to the Agreement applies paragraph 12.2 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)

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Official Journal of the European Union

L 201/87

ANNEX I

COMMUNICATION

(maximum format: A4 (210 × 297 mm))

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Official Journal of the European Union

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ANNEX II

Example of the arrangement of the 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 022439.

Note: The first two digits of the approval number indicate that the approval was granted in accordance with the

requirements of this Regulation as amended by the 02 series of amendments.

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.

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Official Journal of the European Union

L 201/89

ANNEX III

Arrangement of tyre markings

1. Example of the markings to be borne by type of tyres placed on the market after the entry into force of this

Regulation

b = 6 mm (min.)
c = 4 mm (min.)

These markings define a pneumatic tyre:

(a) having a nominal section width of 185;

(b) having a nominal aspect ratio of 70;

(c) of radial-ply structure (R);

(d) having a nominal rim diameter of 14;

(e) having a load capacity of 580 kg, corresponding to load index 89 in Annex IV to this Regulation;

(f) of speed category T (maximum speed 190 km/h);
(g) for fitting without an inner tube (‘tubeless’);
(h) of ‘snow’ type (M + S);

(i) manufactured during the 25th week of the year 2003.

2. In the particular case of tyres having a tyre to rim fitment configuration ‘A’ or ‘U’, the marking shall be in the

form of the following example:

185-560 R 400A, or 185-560 R 400U where:

185 is the nominal section width in mm,

560 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,

400 is the nominal diameter of the rim expressed in mm,

A or U is the tyre to rim fitment configuration.

The marking of the load index, speed category, 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 size designation as defined in paragraph 2.17. of this Regulation shall be grouped as shown in the above
examples: 185/70 R 14 and 185-560 R 400A or 185-560 R 400U;

(b) the service description comprising the load index and the speed symbol shall be placed immediately after the tyre

size designation as defined in paragraph 2.17. of this Regulation;
the symbols ‘tubeless’, ‘reinforced’, and ‘M + S’ may be at a distance from the size-designation.

(c)

L 201/90

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Official Journal of the European Union

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ANNEX IV

Load-capacity indices

Li = Load-capacity index

kg = Corresponding mass of the vehicle which is to be carried.

Li

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

kg

45

46,2

47,5

48,7

50

51,5

53

54,5

56

58

60

61,5

63

65

67

69

71

73

75

77,5

80

82,5

85

87,5

90

92,5

95

97,5

100

103

106

Li

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

kg

109

112

115

118

121

125

128

132

136

140

145

150

155

160

165

170

175

180

185

190

195

200

206

212

218

224

230

236

243

250

Li

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

kg

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

Li

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

kg

615

630

650

670

690

710

730

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

30.7.2008

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Official Journal of the European Union

L 201/91

ANNEX V

Tyre size designation and dimensions

Table I

Tyres in Diagonal Construction (European tyres)

Size

Measuring rim width
code

Overall diameter (1)
mm

Tyre section width (1)
mm

Nominal rim diameter
‘d’
mm

Super Ballon Series

4.80-10

5.20-10

5.20-12

5.60-13

5.90-13

6.40-13

5.20-14

5.60-14

5.90-14

6.40-14

5.60-15

5.90-15

6.40-15

6.70-15

7.10-15

7.60-15

8.20-15

Low Section Series

5.50-12

6.00-12

7.00-13

7.00-14

7.50-14

8.00-14

6.00-15 L

Super Low Section Series (2)

155-13/6.15-13

165-13/6.45-13

175-13/6.95-13

3.5

3.5

3.5

4

4

4.5

3.5

4

4

4.5

4

4

4.5

4.5

5

5.5

6

4

4.5

5

5

5.5

6

4.5

4.5

4.5

5

490

508

558

600

616

642

612

626

642

666

650

668

692

710

724

742

760

552

574

644

668

688

702

650

582

600

610

128

132

132

145

150

163

132

145

150

163

145

150

163

170

180

193

213

142

156

178

178

190

203

156

157

167

178

254

254

305

330

330

330

356

356

356

356

381

381

381

381

381

381

381

305

305

330

356

356

356

381

330

330

330

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Size

Measuring rim width
code

Overall diameter (1)
mm

Tyre section width (1)
mm

Nominal rim diameter
‘d’
mm

155-14/6.15-14

165-14/6.45-14

175-14/6.95-14

185-14/7.35-14

195-14/7.75-14

Ultra Low Section

5.9-10

6.5-13

6.9-13

7.3-13

4.5

4.5

5

5.5

5.5

4

4.5

4.5

5

608

626

638

654

670

483

586

600

614

157

167

178

188

198

148

166

172

184

356

356

356

356

356

254

330

330

330

(1) Tolerance: see paragraphs 6.1.4. and 6.1.5.
(2) The following size designations are accepted: 185-14/7.35-14 or 185-14 or 7.35-14 or 7.35-14/185-14.

Table II
Millimetric Series — Radial (European tyres)

Size

Measuring rim width
code

Overall diameter (1)
mm

Tyre section width (1)
mm

Nominal rim diameter
‘d’
mm

125 R 10

145 R 10

125 R 12

135 R 12

145 R 12

155 R 12

125 R 13

135 R 13

145 R 13

155 R 13

165 R 13

175 R 13

185 R 13

125 R 14

135 R 14

145 R 14

155 R 14

165 R 14

3.5

4

3.5

4

4

4.5

3.5

4

4

4.5

4.5

5

5.5

3.5

4

4

4.5

4.5

459

492

510

522

542

550

536

548

566

578

596

608

624

562

574

590

604

622

127

147

127

137

147

157

127

137

147

157

167

178

188

127

137

147

157

167

254

254

305

305

305

305

330

330

330

330

330

330

330

356

356

356

356

356

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Official Journal of the European Union

L 201/93

Size

Measuring rim width
code

Overall diameter (1)
mm

Tyre section width (1)
mm

Nominal rim diameter
‘d’
mm

175 R 14

185 R 14

195 R 14

205 R 14

215 R 14

225 R 14

125 R 15

135 R 15

145 R 15

155 R 15

165 R 15

175 R 15

185 R 15

195 R 15

205 R 15

215 R 15

225 R 15

235 R 15

175 R 16

185 R 16

205 R 16

5

5.5

5.5

6

6

6.5

3.5

4

4

4.5

4.5

5

5.5

5.5

6

6

6.5

6.5

5

5.5

6

634

650

666

686

700

714

588

600

616

630

646

660

674

690

710

724

738

752

686

698

736

178

188

198

208

218

228

127

137

147

157

167

178

188

198

208

218

228

238

178

188

208

356

356

356

356

356

356

381

381

381

381

381

381

381

381

381

381

381

381

406

406

406

(1) Tolerance: see paragraphs 6.1.4. and 6.1.5.

Table III
45 Series — Radial on TR Metric 5° Rims

Size

Measuring rim width

Overall diameter

Tyre section width

280/45 R 415

240

661

281

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Official Journal of the European Union

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ANNEX VI

Method of measuring pneumatic tyres

1.1. Mount the tyre on the measuring rim specified by the manufacturer pursuant to paragraph 4.1.12 of this

Regulation and inflate it to a pressure of 3 to 3.5 bar.

1.2. Adjust the pressure as follows:

1.2.1.

in standard bias-belted tyres: to 1.7 bar;

1.2.2.

in diagonal (bias-ply) tyres: to:

Ply-rating

4

6

8

Pressure (bar)

Speed category

L, M, N

P, Q, R, S

T, U, H, V

1,7

2,1

2,5

2,0

2,4

2,8

—

2,6

3,0

1.2.3.

in standard radial tyres: to 1.8 bar;

1.2.4.

in reinforced tyres: to 2.3 bar;

1.2.5.

in T-tyre temporary use spare tyres: to 4.2 bar.

2.

3.

4.

5.

Condition the tyre, mounted on its rim, at the ambient room temperature for not less than 24 hours, save as
otherwise prescribed in paragraph 6.2.3 of this Regulation.

Readjust the pressure to the level specified in paragraph 1.2 above.

Measure the overall width by calliper at six equally-spaced points, taking the thickness of the protective ribs or
bands into account. The highest measurement so obtained is taken as the overall width.

Determine the outer diameter by measuring the maximum circumference and dividing the figure so obtained by
π (3.1416).

30.7.2008

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Official Journal of the European Union

L 201/95

ANNEX VII

Procedure for load/speed performance tests

1.

PREPARING THE TYRE

1.1.

Mount a new tyre on the test rim specified by the manufacturer pursuant to paragraph 4.1.12. of this Regulation.

1.2.

Inflate it to the appropriate pressure as given (in bar) in the table below:

T-type temporary use spare tyres: to 4,2 bar.

Diagonal (bias-ply) tyres

Radial/Run flat system

Bias-belted tyres

Speed category

Ply rating

Standard

Reinforced

Standard

L, M, N

P, Q, R, S

T, U, H

V

W

Y

4

2,3

2,6

2,8

3,0
—

—

6

2,7

3,0

3,2

3,4
—

—

8

3,0

3,3

3,5

3,7
—

—

2,4

2,6

2,8

3,0

3,2

3,2 (1)

2,8

3,0

3,2

3,4

3,6

3,6

—

2,6

2,8
—

—

—

(1) The value of ‘3,2’ in respect of Speed Category ‘Y’ tyres was inadvertently omitted from Supplement 5 to the 02 series of
amendments which entered into force on 8 January 1995 and may be considered as a Corrigendum to this Supplement and
to have been effective from that same date.

1.3.

The manufacturer may request, giving reasons, the use of a test-inflation pressure differing from those given
under paragraph 1.2. above. In such a case the tyre shall be inflated to that pressure.

1.4.

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

1.5.

Readjust the tyre pressure to that specified in paragraph 1.2. or 1.3. above.

2.

2.1.

CARRYING OUT THE TEST

Mount the tyre-and-wheel assembly on a test axle and press it against the outer face of a smooth wheel 1,70 m
± 1 per cent or 2 m ± 1 per cent in diameter.

2.2.

Apply to the test axle a load equal to 80 per cent of:

2.2.1.

the maximum load rating equated to the Load Capacity Index for tyres with Speed Symbols L to H inclusive,

2.2.2.

the maximum load rating associated with a maximum speed of 240 km/h for tyres Speed Symbol ‘V’ (see para.
2.31.2. of this Regulation),

2.2.3.

the maximum load rating associated with a maximum speed of 270 km/h for tyres with speed symbol ‘W’ (see
paragraph 2.31.3. of this Regulation),

2.2.4.

the maximum load rating associated with a maximum speed of 300 km/h for tyres with speed symbol ‘Y’ (see
paragraph 2.31.4. of this Regulation).

2.3.

Throughout the test the tyre pressure must not be corrected and the test load must be kept constant.

2.4.

During the test the temperature in the test-room must be maintained at between 20° and 30° or at a higher
temperature if the manufacturer agrees.

2.5.

Carry the test through, without interruption in conformity with the following particulars:

2.5.1.

time taken to pass from zero speed to initial test speed: 10 minutes;

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2.5.2.

initial test speed: prescribed maximum speed for the type of tyre (see paragraph 2.29.3 of this Regulation), less
40 km/h in the case of the smooth wheel having 1,70 m ± 1 per cent in diameter or less 30 km/h in the case of
the smooth wheel having 2 m ± 1 per cent in diameter;

2.5.3.

successive speed increments: 10 km/h;

2.5.4.

duration of test at each speed step except the last: 10 minutes;

2.5.5.

duration of test at last speed step: 20 minutes;

2.5.6. maximum test speed: prescribed maximum speed for the type of tyre, less 10 km/h in the case of the smooth
wheel having 1,7 m ± 1 per cent in diameter or equal to the prescribed maximum speed in the case of the
smooth wheel having 2 m ± 1 per cent in diameter;
however, for tyres suitable for maximum speed of 300 km/h (speed symbol ‘Y’), the duration of the test is 20
minutes at the initial test speed step and 10 minutes at the last speed step.

2.5.7.

2.6.

The procedure for the second test (see paragraph 6.2.1.1.), to assess the performance of a tyre suitable for speeds
in excess of 300 km/h, shall be as follows:

2.6.1.

apply to the test axle a load equal to 80 per cent of the maximum load rating associated with the maximum
speed specified by the tyre manufacturer (see paragraph 4.1.15. of this Regulation).

2.6.2. The test shall be run without interruptions in accordance with the following:

2.6.2.1. ten minutes to build up from zero to the maximum speed specified by the tyre manufacturer (see paragraph

4.1.15. of this Regulation).

2.6.2.2. Five minutes at the maximum test speed.

3.

3.1.

3.2.

3.3.

3.4.

3.5.

3.6.

3.7.

3.8.

PROCEDURE TO ASSES THE ‘FLAT TYRE RUNNING MODE’ OF ‘RUN FLAT SYSTEM’

Mount a new tyre on the test rim specified by the manufacturer pursuant to paragraphs 4.1.12. and 4.1.15. of
this Regulation.

Carry out the procedure as detailed in paragraphs 1.2. to 1.5. above with a test room temperature at 38 °C ± 3 °C
in relation to conditioning the tyre-and-wheel assembly as detailed in paragraph 1.4.

Remove the valve insert and wait until the tyre deflates completely.

Mount the tyre-and-wheel assembly to a test axle and press it against the outer surface of a smooth wheel 1,70 m
± 1 per cent or 2.0 m ± 1 per cent in diameter.

Apply to the test axle a load equal to 65 per cent of the maximum load rating corresponding to the load capacity
index of the tyre.

At the start of the test, measure the deflected section height (Z1).

During the test the temperature of the test room must be maintained at 38 °C ± 3 °C.

Carry the test through, without interruption in conformity with the following particulars:

3.8.1.

time taken to pass from zero speed to constant test speed: 5 minutes;

3.8.2.

test speed: 80 km/h;

3.8.3.

duration of test at the test speed: 60 minutes.

3.9.

At the end of the test, measure the deflected section height (Z2).

3.9.1. Calculate the change in per cent of the deflected section height compared to the deflected section height at the

start of the test as ((Z1 – Z2) / Z1) × 100.

4.

EQUIVALENT TEST METHODS

If a method other than that described in paragraphs 2. and/or 3. above is used,
demonstrated.

its equivalence must be