Regulation No. 109-00

Name:Regulation No. 109-00
Description:Retreaded Tyres - Commercial Vehicles.
Official Title:Uniform Provisions Concerning the Approval of: the Production of Retreaded Pneumatic Tyres for Commercial Vehicles and their Trailers.
Country:ECE - United Nations
Date of Issue:1998-11-03
Amendment Level:00 Series, Supplement 7
Number of Pages:63
Vehicle Types:Bus, Component, Heavy Truck, Light Truck, Trailer
Subject Categories:Steering, Wheels and Tyres
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Keywords:

tyre, test, tyres, regulation, paragraph, snow, load, speed, approval, annex, index, production, retreaded, rim, candidate, means, srtt, symbol, vehicle, material, tread, retreading, diameter, control, width, case, reference, nominal, conditions, service, size, average, number, performance, unit, acceleration, pressure, capacity, section, standard, sidewall, tests, authority, date, grip, requirements, testing, force, type, maximum

Text Extract:

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E/ECE/324
) Rev.2/Add.108/Rev.1/Amend.1
E/ECE/TRANS/505 )
February 5, 2016
STATUS OF UNITED NATIONS REGULATION
ECE 109-00
UNIFORM PROVISIONS CONCERNING THE APPROVAL FOR:
THE PRODUCTION OF RETREADED PNEUMATIC TYRES
FOR COMMERCIAL VEHICLES AND THEIR TRAILERS
Incorporating:
00 series of amendments
Date of Entry into Force: 23.06.98
Corr. 1 to the 00 series of amendments
Dated: 10.03.99
Supplement 1 to the 00 series of amendments
Date of Entry into Force: 21.02.02
Corr. 1 to Supplement 1 to the 00 series of amendments
Dated: 12.03.03
Supplement 2 to the 00 series of amendments
Date of Entry into Force: 13.11.04
Supplement 3 to the 00 series of amendments
Date of Entry into Force: 09.11.05
Supplement 4 to the 00 series of amendments
Date of Entry into Force: 10.11.07
Supplement 5 to the 00 series of amendments
Date of Entry into Force: 24.10.09
Supplement 6 to the 00 series of amendments
Date of Entry into Force: 17.03.10
Supplement 7 to the 00 series of amendments
Date of Entry into Force: 20.01.16

Regulation No. 109-00
UNIFORM PROVISIONS CONCERNING THE APPROVAL FOR THE PRODUCTION OF
RETREADED PNEUMATIC TYRES FOR COMMERCIAL VEHICLES AND THEIR TRAILERS
CONTENTS
REGULATION
1. Scope
2. Definitions
3. Markings
4. Application for approval
5. Approval
6. Requirements
7. Specifications
8. Modifications to the approval
9. Conformity of production
10. Penalties for non-conformity of production
11. Production definitely discontinued
12. Names and addresses of technical services responsible for conducting approval tests, of test
laboratories, and of administrative departments
ANNEXES
Annex 1 -
Annex 2 -
Annex 3 -
Annex 4 -
Annex 5 -
Annex 6 -
Communication concerning the approval or extension or refusal or withdrawal of approval or
production definitely discontinued of a retreading production unit pursuant to
Regulation No. 109
Arrangement of approval mark
Arrangement of retread tyre markings
List of load indices and corresponding load capacities
Tyre size designation and dimensions
Method of measuring pneumatic tyres

1. SCOPE
This Regulation covers the production of retreaded pneumatic designed primarily for
vehicles of Category M , M , N and O and O . However, It does not apply to the
production of:
1.1. Retreaded tyres with a speed capability below 80km/h;
1.2. Tyres originally produced without speed symbols and/or load indices;
1.3. Tyres originally produced without type approval and without either an "E" or "e" mark.
2. DEFINITIONS − See also Figure in Annex 9
For the purpose of this Regulation:
2.1. "Range of retreaded pneumatic tyres" - means a range of retreaded pneumatic tyres as
quoted in Paragraph 4.1.4.
2.2. "Structure" of a pneumatic-tyre means the technical characteristics of the tyre's
carcass. The following structures are distinguished in particular:
2.2.1. "Diagonal" or "Bias ply" describes a pneumatic-tyre structure in which the ply cords
extend to the beads and are laid at alternate angles substantially less than 90° to the
centreline of the tread.
2.2.2. "Bias belted" describes a pneumatic-tyre structure of diagonal (bias-ply) type in which the
carcass is stabilised by a belt, comprising two or more layers of substantially inextensible
cord material laid at alternate angles close to those of the carcass.
2.2.3. "Radial" describes a pneumatic-tyre structure in which the ply cords extend to the beads
and are laid substantially at 90° to the centreline of the tread, the carcass being stabilised by
an essentially inextensible circumferential belt.
2.3. Category of Use
2.3.1. "Normal tyre" is a tyre intended for normal road use only.
2.3.2. "Special use tyre" is a tyre intended for mixed use, both on and off road and/or at
restricted speed.
2.3.3. "Snow tyre" means a tyre whose tread pattern, tread compound or structure, are primarily
designed to achieve in snow-conditions a performance better than that of a normal tyre with
regard to its ability to initiate or maintain vehicle motion.
2.3.3.1. "Snow tyre for use in severe snow conditions" means a snow tyre whose tread pattern,
tread compound or structure is specifically designed to be used in severe snow conditions
and that fulfils the requirements of Paragraph 7.2. of this Regulation.

2.20. "Outer diameter" means the overall diameter of an inflated, newly retreaded tyre.
2.21. "Tyre size designation" means a designation showing:
2.21.1. The nominal section width. This must be expressed in millimetres, except in cases of
tyres for which the size designation is shown in the first column of the tables in Annex 5 to
this Regulation.
2.21.2. The nominal aspect ratio except in case of tyres for which the size designation is shown in
the first column of the tables in Annex 5 to this Regulation or, depending on the tyre design
type, for example, tyres identified by the tyre to rim fitment configuration Symbol "A" (see
Paragraph 2.21.4.), the nominal outer diameter expressed in mm.
2.21.3. A conventional number "d" (the "d" symbol) denoting the nominal rim diameter of the rim
and corresponding to its diameter expressed either by codes (numbers below 100) or in
millimetres (numbers above 100). Numbers corresponding to both types of measurements
may be used in the designation.
2.21.3.1. The values of the "d" symbols expressed in millimetres are shown below:
Nominal Rim Diameter Code −
"d"
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
Value of the "d" symbol
expressed in mm
203
229
254
279
305
330
356
381
406
432
457
483
508
533
559
610
635
368
419
445
495
521
572
622
660
711
762

2.27. "Chunking" means the breaking away of pieces of rubber from the tread.
2.28. "Cord separation" means the parting of the cords from their rubber coating.
2.29. "Ply separation" means the parting of adjacent plies.
2.30. "Tread separation" means the pulling away of the tread from the carcass.
2.31. "Service description" means the specific combination of the load index and speed symbol
of the tyre.
2.32. "Load index" means a numerical code which indicates the load the tyre can carry at the
speed corresponding to the associated speed symbol and when operated in conformity with
the service conditions specified by the manufacturer. A pneumatic tyre can have more than
one load index to indicate its load capacity when used in single or dual (twin) formation, or
to indicate an alternative load capacity (Unique point) on which a load variation in
accordance with Paragraph 2.35. and Annex 8 to this Regulation is not permitted.
The list of load indices and the corresponding loads are shown in Annex 4 to this
Regulation.
2.33. "Speed symbol" means:
2.33.1. An alphabetical symbol indicating the speed at which the tyre can carry the load given by
the associated load index.
2.33.2. The speed symbols and corresponding speeds are as shown in the table below:
Speed symbol
F
G
J
K
L
M
N
P
Q
R
S
T
U
H
Corresponding maximum speed
(km/h)
80
90
100
110
120
130
140
150
160
170
180
190
200
210
2.34. "Unique point" means an additional service description, marked adjacent to the normal
service description, but which must not be used for calculating a load capacity variation as
defined in Paragraph 2.35. and in Annex 8 to this Regulation.
2.35. "Load-capacity variation with speed" means an alternative load capacity for the tyre
when used at a speed different from that indicated by the speed symbol in the normal
service description. The permissible variations are given in the table in Annex 8 to this
Regulation.

2.45. "Cure" is the term used to describe the change in physical properties of the new material
which is brought about usually by the application of heat and pressure for a set period of
time under controlled conditions.
2.46. "Representative tyre size" means the tyre size which is submitted to the test described in
Annex 10 to this Regulation to assess the performance of a range of tyres produced by the
retreading production facility with regard to their performance for use in severe snow
conditions. It can be either a retreaded tyre produced with a pre-cured tread or a retreaded
tyre with mould cure process.
2.47. "Standard reference test tyre (SRTT)" means a tyre that is produced, controlled and
stored in accordance with the American Society for Testing and Materials (ASTM)
standards:
(a)
E1136-93 (2003) for the size P195/75R14;
(b) F2872 (2011) for the size 225/75 R 16 C;
(c)
(d)
F2871 (2011) for the size 245/70R19.5;
F2870 (2011) for the size 315/70R22.5.
2.48. "Control tyre" means a new production tyre that is used to establish the snow grip
performance of tyre sizes unable to be fitted to the same vehicle as the standard reference
test tyre – see Paragraph 3.4.3. of Annex 10 to this Regulation.
2.49. "Snow grip index (SG)" means the ratio between the performance of the candidate tyre
and the performance of the standard reference test tyre.
2.50. "Candidate tyre" means a tyre, that is submitted to one of the procedures for snow
performance testing relative to snow tyre for use in severe snow conditions – see Annex 10
to this Regulation.
2.51. Class C2 tyres: Tyres conforming to Regulation No. 54 and identified by a load capacity
index in single formation lower or equal to 121 and a speed category symbol higher or equal
to "N";
2.52. Class C3 tyres: Tyres conforming to Regulation No. 54 and identified by:
(a)
(b)
A load capacity index in single formation higher or equal to 122 or;
A load capacity index in single formation lower or equal to 121 and a speed category
symbol lower or equal to "M".

3.2.8. The date of retreading as follows:
3.2.8.1. In the form of a group of four digits, the first two showing the week number and the second
two showing the year in which the tyre was retreaded. The date code can cover a period of
production from the week indicated by the week number up to and including the week
number plus three. For example, the marking "2503" could indicate a tyre which was
retreaded in weeks 25, 26, 27 or 28 of the year 2003.
The date code may be marked on one sidewall only.
3.2.9. In the case of tyres which can be regrooved, the symbol " " in a circle at least 20mm
diameter, or the word "REGROOVABLE", moulded into or on to each sidewall.
3.2.10. An indication, by the means of the "PSI" index, of the inflation pressure to be adopted for the
load/speed endurance tests, as explained in Annex 7, Appendix 2 to this Regulation.
This indication may be placed on one sidewall only.
3.2.11. The term "RETREAD". At the request of the retreader, the same term in other languages
may also be added.
3.2.12. The inscription "ET" or "ML" or "MPT" for Special use tyres.
3.2.13. Tyres manufactured using the "bead to bead" process as defined in Paragraph 2.37.3., or
any process in which the sidewall material is renewed, shall have the identification referred
to in Paragraph 2.21.4., placed only immediately after the rim diameter marking referred to
in Paragraph 2.21.3.
3.2.14. The prefix "LT" or the suffix "C" or "LT" following the rim diameter marking referred to in
Paragraph 2.21.3. and, if applicable, after the tyre to rim fitment configuration symbol
referred to in Paragraph 2.21.4. or the suffix "LT" after the service description.
3.2.14.1. 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 fitment equal to or less than 121 and
intended for the equipment of motor vehicles;
3.2.14.2. 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 equal to or greater than 122 and intended
for the equipment of motor vehicles.

4.1.4. The following information in relation to the range of tyres to be retreaded:
4.1.4.1. The range of tyre sizes;
4.1.4.2. The structure of tyres (diagonal or bias ply, bias-belted or radial);
4.1.4.3. The category of use of tyres (normal, snow or special tyres);
4.1.4.3.1. For snow tyres the list of tyres having to fulfil the requirements of Paragraph 7.2.
4.1.4.4. The system of retreading and the method of application of the new materials to be used, as
defined in Paragraphs 2.37. and 2.41.;
4.1.4.5. The maximum speed symbol of the tyres to be retreaded;
4.1.4.6. The maximum load index of the tyres to be retreaded;
4.1.4.7. The nominated International Tyre Standard to which the range of tyres conform.
4.2. The application for approval shall be accompanied by:
4.2.1. Details of the major features, including the tread pattern, with respect to the effects on the
snow grip performance of the range of tyre sizes listed as required by Paragraph 4.1.4.3.1.
This may be by means of descriptions supplemented by drawings and/or photographs which
must be sufficient to allow the type approval authority or technical service to determine
whether any subsequent changes to the major features will adversely affect the tyre
performance. The effects of changes to minor details of tyre construction on tyre
performances will be evident and determined during checks on conformity of production;
4.3. At the request of the Type Approval Authority, the applicant shall submit samples of tyres for
test or copies of test reports from the technical services, communicated as given in
Paragraph 12. of this Regulation.
5. APPROVAL
5.1. To retread tyres requires the approval of the retreading production unit by the approval
authorities in accordance with the requirements of this Regulation. The approval authority
shall take the necessary measures as described in this Regulation in order to ensure that
the tyres retreaded in the respective production unit will meet-with the requirements stated
in this Regulation. The retread production unit shall be fully responsible for ensuring that
the retreaded tyres will meet the requirements of this Regulation and that they will perform
adequately in normal use.
5.2. In addition to the normal requirements for the initial assessment of the tyre retreading
production unit, the approval authority shall be satisfied that the procedures, operation,
instructions and specification documentation provided by material suppliers are in a
language readily understood by the tyre retreading production unit operatives.
5.3. The approval authority shall ensure that the procedures and operations documentation for
each production unit contains specifications, appropriate to the repair materials and
processes used, of the limits of repairable damage or penetrations to the tyre carcass,
whether such damage is existing or is caused during the processes of preparation for
retreading.

5.8. There shall be affixed conspicuously to every retreaded tyre conforming to this Regulation,
in the space referred to in Paragraph 3.3. and in addition to the markings prescribed in
Paragraph 3.2., an international approval mark consisting of:
5.8.1. A circle surrounding the Letter "E" followed by the distinguishing number of the country
which granted approval ; and
5.8.2. An approval number as described in Paragraph 5.6.
5.9. Annex 2 to this Regulation gives an example of the arrangements of the approval mark.
6. REQUIREMENTS
6.1. Tyres shall not be accepted for first retread unless they have been type approved and bear
either an "E" or "e" mark.
6.2. Conditions before retreading:
6.2.1. Tyres shall be clean and dry before inspection.
6.2.2. Before buffing, each tyre shall be thoroughly examined both internally and externally to
ensure its suitability for retreading.
6.2.3. Tyres where damage is visible which has resulted from overload or underinflation shall not
be retreaded.
6.2.4. Tyres showing any of the following damage shall not be accepted for retreading:
6.2.4.1. General:
(a)
(b)
(c)
(d)
non repairable rubber cracking extending through to the carcass
carcass break up
appreciable oil or chemical attack
damaged or broken bead core
(e) previous repairs of damage outside specified injury limits − see Paragraph 5.3.

6.3.5. Buffing damage to diagonal ply tyres shall not extend beyond the outermost carcass ply in
the crown area. It shall be assumed that the first ply encountered is a carcass ply unless a
breaker can be positively identified. If a breaker is fitted, localized damage is permissible.
6.3.6. Localized buffing damage to the belt of radial tyres is permissible. For larger damage it is
permissible for the complete belt or sections of the belt to be replaced. Where a protective
breaker is fitted, and can be positively identified as such, if it is damaged it is permissible to
remove it and it need not be renewed.
6.3.7. Exposed steel parts shall be treated as soon as possible with appropriate material as
defined by the manufacturer of that appropriate material.
6.4. Retreading:
6.4.1. The retreader must ensure that either the manufacturer or the supplier of repair materials,
including patches, is responsible for the following:
(a)
(b)
(c)
(d)
(e)
defining method(s) of application and storage, if requested by the retreader, in the
national language of the country in which the materials are to be used;
defining limits of damage for which the materials are designed, if requested by the
retreader, in the national language of the country in which the materials are to be
used;
ensuring that reinforced patches for tyres, if correctly applied in carcass repairs, are
suitable for the purpose;
ensuring that the patches are capable of withstanding twice the maximum inflation
pressure as given by the tyre manufacturer;
ensuring the suitability of any other repair materials for the service intended.
6.4.2. The retreader shall be responsible for the correct application of the repair material and for
ensuring that the repair is free from any defects which may affect the satisfactory service life
of the tyre.
6.4.3. The area surrounding a reinforced repair to a sidewall or shoulder of a radial ply tyre may
bulge slightly when the tyre is fitted and inflated to the recommended operating
pressure. Reinforced repair materials with physical properties that restrict the height of the
bulge to not more than 4mm shall be used.
6.4.4. The retreader shall ensure that either the manufacturer or the supplier of tread and sidewall
material issues specifications concerning the conditions of storage and use of the material in
order to guarantee the material's qualities. If requested by the retreader, this information
shall be in the national language of the country in which the materials are to be used.

6.4.6. The processed tyre shall be cured as soon as possible after the completion of all repairs
and building-up operations and at the latest according to the material manufacturer's
specifications.
6.4.7. The tyre shall be cured for the length of time and at the temperature and pressure,
appropriate to, and specified for, the materials and processing equipment used. The
dimensions of the mould must be appropriate to the thickness of the new material and the
size of the buffed tyre.
6.4.8. The thickness of original material after buffing and the average thickness of any new
material under the tread pattern after retreading shall be as given in Paragraphs 6.4.8.1.
and 6.4.8.2.
6.4.8.1. For radial ply tyres (mm):
3 ≤ (A+B) ≤ 13
(minimum 3.0mm; maximum 13.0mm)
A ≥ 2
(minimum 2.0mm)
B ≥ 0
(minimum 0.0mm)
P.D. =
Pattern depth
X
=
Buff line
A
=
Average thickness of new material under pattern
B
=
Minimum thickness of original material above belt after buffing

6.5.4. After retreading, the dimensions of the retreaded tyre, when measured in accordance with
Annex 6 to this Regulation, must conform either to dimensions calculated according to the
procedures in Paragraph 7 or to those given in Annex 5 to this Regulation. Note that:
(a)
(b)
the maximum outer diameter of a retreaded tyre may be up to 1.5% greater than the
maximum outer diameter of the same tyre size designation permitted by
Regulation No. 54;
and the maximum section width of a radial retreaded tyre may be up to 1.5% greater
than the maximum section width of the same tyre size designation permitted by
Regulation No. 54.
6.6. Performance Tests
6.6.1. Load/speed Endurance Test
6.6.1.1. Tyres retreaded to comply with this Regulation shall be capable of meeting the load/speed
endurance test as specified in Annex 7 to this Regulation.
6.6.1.2. A retreaded tyre which after undergoing the load/speed endurance test does not exhibit any
tread separation, ply separation, cord separation, chunking or broken cords shall be
deemed to have passed the test.
6.6.1.3. The outer diameter of the tyre, measured 6h after the load/speed endurance test, must not
differ by more than ± 3.5% from the outer diameter as measured before the test.
6.6.2. Snow Test
6.6.2.1. Retreaded Snow Tyres for use in severe snow conditions to comply with this Regulation
shall be capable of meeting snow performance test as specified in Annex 10 to this
Regulation.
7. SPECIFICATIONS
7.1. Tyres retreaded to comply with this Regulation shall conform to the following dimensions:
7.1.1. Section Width:
7.1.1.1. The section width shall be calculated by the following formula:
where:
S = S + K (A − A )
S: is the actual section width in millimetres as measured on the test rim;
S :
is the value of the 'Design Section Width', referred to the measuring rim, as quoted in
the International Tyre Standard specified by the retreader for the tyre size in question;
A: is the width of the test rim in millimetres;
A :
is the width in millimetres of the measuring rim as quoted in the International Tyre
Standard specified by the retreader for the tyre size in question.
K: is a factor and shall be taken to equal 0.4.
7.1.1.1.1. In the case of tyres identified by the tyre to rim fitment configuration Symbol "A" (see
Paragraph 2.21.4.) the factor "K" shall be 0.6.

7.1.4.4. For retreaded radial tyres with nominal section width exceeding 305mm for dual mounting
(twinning) and a nominal aspect ratio higher than 60, an additional sidewall protective
rubber layer (ASP) may be applied to a maximum of 8mm greater than the overall width of
the same tyre size description permitted by Regulation No. 54 provided that:
(a)
(b)
(c)
This rubber layer is applied to one sidewall only;
The sidewall concerned is marked with the wording "ASP" and the wording
"OUTSIDE", both markings with a minimal height of 8mm;
The maximum allowed speed rating is index J (100km/h).
7.1.5. Outer Diameter Specifications:
7.1.5.1. The actual outer diameter of a retreaded tyre must not be outside the values of D and
D obtained by the following formulae:
D = d + (2H x a)
D = 1.015 x [d + (2H x b)]
where:
7.1.5.1.1. For sizes not given in the tables in Annex 5 to this Regulation, "H" and "d" are as defined in
Paragraph 7.1.2.1.
7.1.5.1.2. For sizes referred to in Paragraph 7.1.2.2. and for tyres identified by the tyre to rim fitment
configuration Symbol "A" (see Paragraph 2.21.4.), the nominal section height "H" is equal
to:
H = 0.5 (D − d)
where "D" and "d" are as defined in Paragraph 7.1.2.1.
7.1.5.1.3. The coefficient "a" = 0.97
7.1.5.1.4. The coefficient "b" is:
Radial tyres
Diagonal (bias-ply)
and bias belted tyres
for normal use tyres 1.04 1.07
for special use tyres 1.06 1.09
7.1.5.2.
For snow tyres the maximum outer diameter (D
) calculated in Paragraph 7.1.5.1. may be
exceeded by not more than 1%

8. MODIFICATIONS TO THE APPROVAL
8.1. Every modification concerning a retreading production unit amending any of the information
given by the retreading production unit in the Application for Approval, see Paragraph 4,
shall be notified to the approval authority which approved the retreading production
unit. That authority may then either:
8.1.1. Consider that the modifications made are unlikely to have an appreciable adverse effect and
that in any case the retreading production unit still meets the requirements; or
8.1.2. Require a further investigation of the approval.
8.2. Confirmation of, or refusal of, approval, specifying the modifications, shall be communicated
by the procedure specified in Paragraph 5.7. to the Parties to the Agreement which apply
this Regulation.
9. 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:
9.1. The retreading production unit approved according to this Regulation shall conform to the
requirements set out in Paragraph 6.
9.2. The holder of the approval shall ensure that, at least the following number of tyres,
representative of the range being produced, is checked and tested as prescribed in this
Regulation:
9.2.1. 0.01% of the total annual production but in any case not less than 2 and not necessarily
more than 10 during each year of production, and spread throughout that year.
9.2.2. At least 1 tyre once every two years in order to verify conformity of the performance of the
snow tyres for use in severe snow conditions fulfilling Paragraph 6.6.2. and not covered by
Paragraphs 6.4.4.1. or 6.4.4.2.
9.2.3. At least 1 tyre once every four years in order to verify conformity of the performance of the
snow tyres for use in severe snow conditions fulfilling Paragraph 6.6.2. and covered by
Paragraphs 6.4.4.1. or 6.4.4.2. This requirement can be fulfilled through the analysis either
of the test results requested in Paragraph 6.4.4.1.c or the report(s) requested in
Paragraph 6.4.4.2.(c).
9.3. If the requirements of Paragraph 9.2. are carried out by or under the control of the approval
authority, the results may be used as part of, or instead of, those prescribed in
Paragraph 9.4.
9.4. The authority which has approved the retreading production unit may at any time verify the
conformity control methods applied in each production facility, including among others the
prescription defined in the Paragraph 6.4.4.1.(c) and 6.4.4.2.(c). For each production facility,
the Type Approval Authority shall take samples at random and at least the following number
of tyres, representative of the range being produced, shall be checked and tested as
prescribed in this Regulation:
9.4.1. 0.01% of the total annual production but in any case not less than 2 and not necessarily
more than 10 during each and every production year.

ANNEX 1
COMMUNICATION
(Maximum format: A4 (210 × 297mm))
issued by:
Name of administration:
.....................................
.....................................
.....................................
Concerning:
APPROVAL GRANTED
APPROVAL EXTENDED
APPROVAL REFUSED
APPROVAL WITHDRAWN
PRODUCTION DEFINITELY DISCONTINUED
of a retreading production unit pursuant to Regulation No. 109.
Approval No ......................................... Extension No. ................................
1. Retreader's name or trade mark: ....................................................................................................
2. Name and address of retreading production unit: ...........................................................................
........................................................................................................................................................
3. If applicable, name and address of retreader's representative: ......................................................
........................................................................................................................................................
4. Summarised description as in Paragraphs 4.1.3. and 4.1.4. of this Regulation: ............................
5. Technical service and, where applicable, test laboratory approved for purposes of approval or
verification of conformity: ................................................................................................................
6. Date of report issued by that service: .............................................................................................
7. Number of report issued by that service: ........................................................................................
8. Reason(s) of extension (if applicable): ............................................................................................
9. Any remarks: ...................................................................................................................................

ANNEX 2
ARRANGEMENT OF APPROVAL MARK
The above approval mark affixed to a retreaded tyre shows that the retreading production unit concerned
has been approved in the Netherlands (E4) under approval number 109R002439, meeting the
requirements of this Regulation in its original form (00).
The approval number must be placed close to the circle and either above or below the "E" or 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.

2. In the particular case of tyres having a tyre to rim fitment configuration "A", the marking shall be
in the form of the following example:
235-700 R 450A where:
235 is the nominal section width in mm
700 is the outer diameter expressed in mm
R is an indication of the structure of the tyre − see Paragraph 3.1.3. of this Regulation
450 is the nominal diameter of the rim expressed in mm
A is the tyre to rim fitment configuration.
The marking of the load index, speed category 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 as follows:
(a)
(b)
(c)
(d)
(e)
The size designation as defined in Paragraph 2.21. of this Regulation shall be grouped
as shown in the above examples: 295/80 R 22.5 or 235-700 R 450A.;
The service description, comprising the load index (indices) and the speed symbol(s)
shall be placed immediately after the tyre size designation as defined in Paragraph 2.21.
of this Regulation.
The symbol "TUBELESS" and "M+S" may be at a distance from the size-designation
symbol.
The word "RETREAD" may be at a distance from the size-designation symbol.
If Paragraph 3.2.5. of this Regulation is applied, the additional service description
(Unique Point), comprising the load indices and speed symbol, must be shown inside a
circle near the nominal service description appearing on the tyre sidewall.

ANNEX 5
TYRE SIZE DESIGNATION AND DIMENSIONS
(IN ACCORDANCE WITH ECE REGULATION No. 54)
FOR THIS INFORMATION REFER TO ANNEX 5 OF ECE REGULATION NO. 54
Note that with reference to Paragraph 6.5.4. of this Regulation, the outer diameter of a retreaded tyre,
and the section width of a radial retreaded tyre, may in all cases be greater than that shown in the tables
in Annex 5 to Regulation No. 54 but by no more than 1.5%.
The overall section width of a retreaded radial tyre with an ASP may in all cases be greater than that
shown in the tables of Annex 5 to Regulation No. 54, but by no more than 8mm.

ANNEX 7
PROCEDURE FOR LOAD/SPEED ENDURANCE TESTS
(IN PRINCIPLE IN ACCORDANCE WITH REGULATION No. 54)
1. PREPARING THE TYRE
1.1. Mount a retreaded tyre on the test rim specified by the retreader.
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 as specified in
Paragraph 3.2.10. of this Regulation.
1.4. Condition the tyre and wheel assembly at test-room temperature for not less than 3 hr.
1.5. Readjust the tyre pressure to that specified in Paragraph 1.3. of this Annex.
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 surfaced power-driven test drum 1.70m ± 1% diameter having a surface at least as
wide as the tyre tread. In certain cases a 2.00m ± 1% diameter drum may be used.
2.2. Apply to the test axle a series of test loads equal to a percentage of the load indicated in
Annex 4 to this Regulation, corresponding to the load index indicated on the tyre, and in
accordance with the test programme below. Where the tyre has load capacity indices for
operation in both single and twin or dual formation the load corresponding to the load index for
single operation shall be used for the test.
2.2.1. In the case of tyres with a speed capacity greater than 150km/h (speed category Symbol "Q"
and above, plus "H") the test procedure shall be as given in Paragraph 3. of this Annex.
2.2.2. For all other tyres the test procedure is as shown in Appendix 1 to this Annex.
2.3. Endurance Test Programme − See also Appendix 1 to this Annex.
2.3.1. The tyre pressure shall not be corrected throughout the test and the test load shall be kept
constant throughout each of the three test stages.
2.3.2. During the test the temperature of the test room shall be maintained at between 20°C and 30°C
unless the tyre manufacturer or retreader agrees to the use of a higher temperature.
2.4. The endurance test programme shall be carried out without interruption.

ANNEX 7 - APPENDIX 1
ENDURANCE-TEST PROGRAMME
Load
index
122 or
more
121 or
less
Speed
symbol
F
G
J
K
L
M
F
G
J
K
Test-drum speed [min ]
Radial-ply
100
125
150
175
200
225
100
125
150
175
Diagonal
(bias-ply)
and bias
belted
Load placed on the wheel as a
percentage of the load
corresponding to the load index
7 h. 16 h. 24 h.
100
100
125
150


66%
84%
101%
100
125
150
175
L 200 175 70% 88% 106%
M
N
P
250
275
300
200


4 h. 6 h.
75%
75%
75%
97%
97%
97%
114%
114%
114%
Notes:
(1) "Special-use" tyres (see Paragraph 2.3.2. of this Regulation) shall be tested at a speed equal to
85% of the speed prescribed for equivalent normal tyres.
(2) Tyres having a load capacity index equal to or greater than 121, a speed category Symbol "N" or
"P" and the additional markings "C" or "LT" included in the tyre size designation (referred to in
Paragraph 3.2.13. of this Regulation), shall be tested with the same programme as specified in
the above table for tyres having a load capacity index equal to or less than 121.

Speed
(km/h)
ANNEX 8
VARIATION OF LOAD CAPACITY WITH SPEED: COMMERCIAL VEHICLE TYRES
RADIAL AND DIAGONAL PLY
(IN ACCORDANCE WITH REGULATION No. 54)
All load indices
Variation of Load Capacity (%)
Load indices
≥122
Load indices
≤121
Speed Symbol
Speed Symbol
Speed Symbol
F
G
J
K
L
M
L
M
N
P

ANNEX 10
PROCEDURES FOR SNOW PERFORMANCE TESTING RELATIVE
TO SNOW TYRE FOR USE IN SEVERE SNOW CONDITIONS
1. SPECIFIC DEFINITIONS FOR SNOW TEST WHEN DIFFERENT FROM EXISTING ONES
1.1. "Test run" means a single pass of a loaded tyre over a given test surface.
1.2. "Braking test" means a series of a specified number of ABS-braking test runs of the same
tyre repeated within a short time frame.
1.3. "Traction test" means a series of a specified number of spin-traction test runs according to
ASTM (American Standard Test Method) Standard F1805-06 of the same tyre repeated
within a short time frame.
1.4. "Acceleration test" means a series of specified number of traction controlled acceleration
test runs of the same tyre repeated within a short timeframe.
2. SPIN TRACTION METHOD FOR CLASSES C2 TYRES (TRACTION FORCE TEST PER
PARAGRAPH 7.2.(B) OF THIS REGULATION).
The test procedure of ASTM Standard F1805-06 shall be used to assess snow performance
through spin traction values on medium packed snow (The snow compaction index
measured with a CTI penetrometer shall be between 70 and 80).
2.1. The test course surface shall be composed of a medium packed snow surface, as
characterized in table A2.1 of ASTM Standard F1805-06.
2.2. The tyre load for testing shall be as per option 2 in Paragraph 11.9.2. of
ASTM Standard F1805-06.

3.1.4. Load and Pressure
3.1.4.1. For C2 tyres, the vehicle load shall be such that the resulting loads on the tyres are between
60% and 100% of the load corresponding to the tyre load index.
The static tyre load on the same axle should not differ by more than 10%.
The inflation pressure is calculated to run at constant deflection:
For a vertical load higher or equal to 75% of the load capacity of the tyre, a constant
deflection is applied, hence the test inflation pressure "P " shall be calculated as follows:
⎛ Q ⎞
P = P


⎝ Q ⎠
Q: is the maximum load associated to the load capacity index of the tyre written on the
sidewall.
P: is the reference pressure corresponding to the maximum load capacity Q .
Q: is the static test load of the tyre.
For a vertical load lower than 75% of the load capacity of the tyre, a constant inflation
pressure is applied, hence the test inflation pressure P shall be calculated as follows:
P = P (0.75) = (0.7) P
P: is the reference pressure corresponding to the maximum load capacity Q .
Check the tyre pressure just prior to testing at ambient temperature.
3.1.4.2. Instrumentation
The vehicle shall be fitted with calibrated sensors suitable for measurements in winter.
There shall be a data acquisition system to store measurements.
The accuracy of measurement sensors and systems shall be such that the relative
uncertainty of the measured or computed mean fully developed decelerations is less than
1%.

3.4. Data Evaluation and Presentation of Results
3.4.1. Parameters to be Reported
3.4.1.1. For each tyre and each braking test, the mean and standard deviation of the mfdd shall be
computed and reported. The coefficient of variation CV of a tyre braking test shall be
computed as:
( tyre)
CV =
Std.dev ( tyre)
Mean(tyre)
3.4.1.2. Weighted averages (wa) of two successive tests of the SRTT shall be computed taking into
account the number of candidate tyres in between:
In the case of the order of testing R1 - T - R2, the weighted average of the SRTT to be used
in the comparison of the performance of the candidate tyre shall be taken to be:
wa(SRTT) = (R1 + R2)/2
Where:
R1: is the mean mfdd for the first test of the SRTT and R2 is the mean mfdd for the second
test of the SRTT.
In the case of the order of testing R1 – T1 – T2 – R2, the weighted average (wa) of the
SRTT to be used in the comparison of the performance of the candidate tyre shall be taken
to be:
wa (SRTT) = 2/3 R1 + 1/3 R2 for comparison with the candidate tyre T1; and:
wa (SRTT) = 1/3 R1 + 2/3 R2 for comparison with the candidate tyre T2.
3.4.1.3. The snow grip index (SG) in per cent of a candidate tyre shall be computed as:
3.4.2. Statistical Validations
Mean
Snow Grip Index ( candidate)
=
wa
( candidate)
( SRTT )
The sets of repeats of measured or computed mfdd for each tyre should be examined for
normality, drift, eventual outliers.
The consistency of the means and standard-deviations of successive braking tests of SRTT
should be examined.
The means of two successive SRTT braking tests shall not differ by more than 5%.
The coefficient of variation of any braking test shall be less than 6%.
If those conditions are not met, tests shall be performed again after re-grooming the test
course.

4.3. Measuring Equipment
4.3.1. A sensor suitable for measuring speed and distance covered on snow/ice surface between
two speeds must be used.
To measure vehicle speed, a fifth wheel or non-contact speed-measuring system (including
radar, GPS …) shall be used.
4.3.2. The following tolerances shall be respected:
(a)
(b)
For speed measurements: ±1% (km/h) or 0.5km/h whichever is greater.
For distance measurements: ±1 x 10 m
4.3.3. A display of the measured speed or the difference between the measured speed and the
reference speed for the test is recommended inside the vehicle so that the driver can adjust
the speed of the vehicle.
4.3.4. For Acceleration test covered in Paragraph 4.7. below, a display of the slip ratio of the
driven tyres is recommended inside the vehicle and shall be used in the particular case of
Paragraph 4.7.2.1.1. below.
The slip ratio is calculated by:
⎡Wheel
Speed − Vehicle Speed ⎤
Slip Ratio % = ⎢
⎥ × 100
⎣ Vehicle Speed ⎦
(a)
(b)
Vehicle speed is measured as defined in 4.3.1. above (m/s);
Wheel speed is calculated on a tyre of the driven axle by measuring its angular
velocity and its loaded diameter
Wheel Speed = π × loaded diameter × angular speed
Where, π = 3.1416 (m/360°), the loaded diameter (m) and the angular speed
(revolution per second = 360°/s).
4.3.5. A data acquisition system can be used for storing the measurements.

4.7. Acceleration on Snow Test Procedure for Snow Grip Index of Classes C3N and C3W
4.7.1. Principle
4.7.2. Vehicle
The test method covers a procedure for measuring the snow grip performance of
commercial vehicle tyres during acceleration, using a commercial vehicle having a Traction
Control System (TCS, ASR, etc.).
Starting with a defined initial speed, the full throttle is applied to activate the Traction Control
System, the Average acceleration is calculated between two defined speeds.
4.7.2.1. The test shall be conducted with a two axles standard model commercial vehicle in good
running conditions equipped with:
(a)
(b)
(c)
(d)
Low rear axle weight and enough powerful engine to ensure the average percentage
of slip during the test as required in Paragraphs 4.7.5.1. and 4.7.5.2.1. below;
A manual gearbox (automatic gearbox with manual shift allowed) having a gear ratio
covering a 19km/h range between 4 and 30km/h;
Blocking differential on driven axle is recommended as increasing repeatability;
A standard commercial system controlling/limiting the slip of the driving axle when
accelerating (called Traction Control, ASR, TCS, etc.).
4.7.2.1.1. In the particular case where it is not possible to find a standard commercial vehicle
equipped with a traction control system, a vehicle without Traction Control/ASR/TCS is
allowed with a mandatory display of the percentage slip as stated in 4.3.4. and a mandatory
blocking differential on the driven axle to put in practice the operating procedure of
Paragraph 4.7.5.2.1. below.
4.7.2.2. The permitted modifications are:
(a)
(b)
Those allowing to increase the number of tyre sizes capable to be mounted on the
vehicle;
Those permitting to install an automatic activation of the acceleration and the
measurements.
Any other modification of the acceleration system is prohibited.
4.7.3. Vehicle Fitting
The rear driven axle may be indifferently fitted with 2 or 4 test tyres if respecting the loading
by tyre.
The front steer non driven axle is equipped with 2 tyres having a size suitable for the axle
load. These 2 front tyres could be maintained along the test.

4.8. Processing of Measurement Results
4.8.1. Calculation of the Average Acceleration AA
Each time the measurement is repeated, the average acceleration AA (m · s ) is calculated
by:
S
AA =
− S
2 D
Where D (m) is the distance covered between the initial speed S (m · s ) and the final
speed S (m · s ).
4.8.2. Validation of Results
For the candidate tyres:
The coefficient of variation of the average acceleration is calculated for all the candidate
tyres. If one coefficient of variation is greater than 6%, discard the data for this candidate
tyre and repeat the test.
For the reference tyre:
stdev
coefficient of variation = × 100
average
If the coefficient of variation of the average acceleration "AA" for each group of min 6 runs of
the reference tyre is higher than 6%, discard all data and repeat the test for all tyres (the
candidate tyres and the reference tyre).
In addition and in order to take in account possible test evolution, the coefficient of validation
is calculated on the basis of the average values of any two consecutive groups of min 6 runs
of the reference tyre. If the coefficient of validation is greater than 6%, discard the data for
all the candidate tyres and repeat the test.
Average 2 − Average 1
coefficient of validation = × 100
Average 1

4.8.6. Calculation of the Slip Ratio
The slip ratio can be calculated as the average of Slip ratio as mentioned in
Paragraph 4.3.4. above or by comparing the average distance referred to in
Paragraph 4.7.5.3. above of the min 6 runs to the distance of a run done without slip (very
low acceleration)
Average distance − No slip distance
Slip Ratio % = × 100
No slip distance
4.9. Snow Grip Performance Comparison between a Candidate Tyre and a Reference Tyre
Using a Control Tyre
4.9.1. Scope
When the candidate tyre size is significantly different from the reference tyre a direct
comparison on the same vehicle may be not possible. This is an approach using an
intermediate tyre, hereinafter called the control tyre.
4.9.2. Principle of the Approach
The principle lies upon the use of a control tyre and 2 different vehicles for the assessment
of a candidate tyre in comparison with a reference tyre.
One vehicle can fit the reference tyre and the control tyre, the other the control tyre and the
candidate tyre. All conditions are in conformity with Paragraph 4.7. above.
The first assessment is a comparison between the control tyre and the reference tyre. The
result (Snow Grip Index 1) is the relative efficiency of the control tyre compared to the
reference tyre.
The second assessment is a comparison between the candidate tyre and the control tyre.
The result (Snow Grip Index 2) is the relative efficiency of the candidate tyre compared to
the control tyre.
The second assessment is done on the same track as the first one. The air temperature
must be in the range of +/-5°C of the temperature of the first assessment. The control tyre
set is the same set as the set used for the first assessment.
The snow grip performance index of the candidate tyre compared to the reference tyre is
deduced by multiplying the relative efficiencies calculated above:
Snow Grip Index = SG1 × SG2
4.9.3. Selection of a Set of Tyres as a Control Tyre Set
A control tyre set is a group of identical tyres made in the same factory during one week
period.

ANNEX 10 – APPENDIX 1
PICTOGRAM DEFINITION OF "ALPINE SYMBOL"
Minimum 15mm base and 15mm height when the marking is on the sidewall.
Minimum 10mm base and 10mm height in case of marking on the shoulder of a pre- cured tread.
Above drawing not to scale.

Part 2 – Test Data
1.
Date of test: ......................................................................................................................................
2.
Location of test track: ........................................................................................................................
2.1.
Test track characteristics:
At start of tests
At end of tests
Specification
Weather
Ambient temperature
-2°C to -15°C
Snow temperature
-4°C to -15°C
CTI index
75 to 85
Other
3.
Test vehicle (make, model and type, year): ......................................................................................
4.
Test tyre details ................................................................................................................................
4.1.
Tyre size designation and service description: .................................................................................
4.2.
Tyre brand and trade description: .....................................................................................................
4.3.
Test tyre data:
SRTT (1st test) Candidate Candidate SRTT (2nd test)
Tyre dimensions
Test rim width code
Tyre loads F/R (kg)
Load index F/R ( per cent)
Tyre pressure F/R(kPa)

ANNEX 10 – APPENDIX 3
TEST REPORTS AND TEST DATA FOR C3 TYRES
Part 1 - Report
1.
Type Approval Authority or Technical Service: .................................................................................
2.
Name and address of applicant: .......................................................................................................
3.
Test report No.: .................................................................................................................................
4.
Manufacturer and brand name or trade description: ........................................................................
5.
Tyre class: .........................................................................................................................................
6.
Category of use: ...............................................................................................................................
7.
Snow index relative to SRTT according to Paragraph 7.2.1.
7.1.
Test procedure and SRTT used .......................................................................................................
8.
Comments (if any): ...........................................................................................................................
9.
Date: .................................................................................................................................................
10.
Signature: ..........................................................................................................................................
11.
Signature of the technical service: ....................................................................................................
12.
Signature of the Type Approval Authority: ........................................................................................

5. Test results: average accelerations (m/s )
Run number
Specification SRTT (1st test) Candidate 1
Candidate 2
Candidate 3
SRTT (2nd test)
1
2
3
4
5
6
Mean
Std-deviation
Slip ratio (per cent)
CV (%) <6%
Validation SRTT (SRTT) <5%
SRTT average
Snow index 1.00
Retreaded Tyres - Commercial Vehicles.