มอก. 2718–2558 
 
-1- 
 มาตรฐานผลิตภัณฑ์อุตสาหกรรม  
ยางล้อแบบสูบลมสําหรับรถยนต์และส่วนพ่วง 
ขอบข่าย 
มาตรฐานผลิตภัณฑ์อุตสาหกรรมนี้ ครอบคลุมเฉพาะยางล้อแบบสูบลมใหม่ ที่ออกแบบมาเพ ื่อใช้สําหรับรถยนต์
ประเภท  M1 N1 O1 และ O2 เป็นหลัก 
ไม่รวมถึงยางที่ออกแบบมาเพ ื่อ 
(ก) เป็นอุปกรณ์สําหรับรถโบราณ  
(ข) การแข่งขัน 
บทนิยาม 
ความหมายของค ําที่ใช้ในมาตรฐานผล ิตภัณฑ์อุตสาหกรรมนี้ ให้เป็นไปตาม  UN Regulation No.30 Revision 3    
ข้อ 2. และที่แก้ไขเพิ่มเติมตาม Amendments 1 และ Amendments 3  
เครื่องหมายและฉลาก  
การแสดงเครื่องหมายและฉลากในมาตรฐานผล ิตภัณฑ์อุตสาหกรรมนี้ ให้เป็นไปตาม  UN Regulation No.30 
Revision 3 ข้อ 3. และที่แก้ไขเพิ่มเติมตาม Amendments 3 Corrigendum 1  ยกเว้นข้อ 3.2 ไม่ใช้ และข้อ 3.4 ไม่
ใช้ แต่ให้เป็นไปตามข้อความต่อไปนี้แทน 
3.4 การแสดงเครื่องหมายและฉลากตามข ้อ 3.1 เครื่องหมายมาตรฐานผล ิตภัณฑ์อุตสาหกรรมและเลขท ี่ มอก. 
(ยกเว้นข้อ 3.1.1 และ 3.1.13) ต้องประทับบนแม่พิมพ์หรือบนยาง  ให้สามารถอ่านออกได้ง่าย ชัดเจน และต้องแสดง
บนแก้มยางอย่างน้อย 1 ด้าน 
คุณลักษณะที่ต้องการ  
คุณลักษณะที่ต้องการในมาตรฐานผล ิตภัณฑ์อุตสาหกรรมนี้ ให้เป็นไปตาม  UN Regulation No.30 Revision 3  ข้อ 
6. และที่แก้ไขเพิ่มเติมตาม Amendments 1 Amendments 3 
การทดสอบ  
การทดสอบและการหาค ่าต่างๆ ในมาตรฐานผล ิตภัณฑ์อุตสาหกรรมนี้ ให้เป็นไปตาม  UN Regulation No.30 
Revision 3  ข้อ 6. และที่แก้ไขเพิ่มเติมตาม Amendments 1 Amendments 3 และ ANNEX ที่เกี่ยวข้อง 
  มอก.2718–2558 
 
-2- 
  E/ECE/324/Rev.1/Add.29/Rev.3/Amend.3/Corr.1 −E/ECE/TRANS/505/Rev.1/Add.29/Rev.3/Amend.3/Corr.1 
GE.14- 
  Agreement  
  Concerning the Adoption of Un iform Technical Prescriptions for 
Wheeled Vehicles, Equipment and Part s 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 *  
(Revision 2, including the amendments which entered into force on 16 October 1995)  
   
  Addendum 29: Regulation No. 30  
  Revision 3 – Ame ndment 3 – Corrigendum 1 
Corrigendum 1 to Amendment 3 to the Revision 3  (Erratum by the secretariat)  
  Uniform provisions concerning the approval of pneumatic tyres for 
motor vehicles and their trailers 
   
 
UNITED NATIONS 
  
 * Former title of the Agreement: Agreement Concerning the Adoption of Uniform Conditions of 
Approval and Reciprocal Recognition of Approval for Motor Vehicle Equipm ent and Parts, done at 
Geneva on 20 March 1958.   
   
 27 August 2014 
มอก. 2718–2558  
                                                              
-3-E/ECE/324/Rev.1/Add.29/Re v.3/Amend.3/Corr.1  
E/ECE/TRANS/505/Rev.1/Add. 29/Rev.3/Amend.3/Corr.1 
2 Paragraph 3.4.,  correct to read: 
"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 paragraphs 3.1.1. and 3.1.12. above." 
   
 มอก. 2718–2558  
                                                              
-4- E/ECE/324/Rev.1/Add.29/Rev.3/Amend.3 −E/ECE/TRANS/505/Rev.1/Add.29/Rev.3/Amend.3 
GE.13- 
  Agreement  
  Concerning the Adoption of Un iform Technical Prescriptions for 
Wheeled Vehicles, Equipment and Part s 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 *  
(Revision 2, including the amendments which entered into force on 16 October 1995)  
   
  Addendum 29: Regulation No. 30  
  Revision 3 – Amendment 3  
Supplement 17 to the 02 series of amendments - Date of entry into force: 27 January 2013 
  Uniform provisions concerning the approval of pneumatic tyres for 
motor vehicles and their trailers 
   
 
UNITED NATIONS 
  
 * Former title of the Agreement: Agreement Concerning the Adoption of Uniform Conditions of 
Approval and Reciprocal Recognition of Approval for Motor Vehicle Equipm ent and Parts, done at 
Geneva on 20 March 1958.   
   
 14 February 2013 
มอก. 2718–2558  
                                                              
-5-E/ECE/324/Rev.1/Add. 29/Rev.3/Amend.3  
E/ECE/TRANS/505/Rev.1/ Add.29/Rev.3/Amend.3 
2 Paragraph 2.1.3 ., amend to read: 
"2.1.3. Category of use (normal tyre, snow tyre, special use tyre or temporary use 
tyre);" 
Insert a new paragraph 2.2.,  to read:  
"2.2. " Normal tyre " means a tyre intended for normal on-road use." 
Paragraph 2.2. (former) , renumber as paragraph 2.3. and amend to read:  
"2.3. " Snow tyre " means a tyre whose tread pattern, tread compound or structure is 
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." 
Insert a new paragraph 2.4.,  to read: 
"2.4.  " Special use tyre " means a tyre intended for mixed use both on- and off-road 
or for other special duty. These tyres are primarily designed to initiate and maintain the vehicle in motion in off-road conditions." 
Insert a new paragraph 2.4.1., to read: 
"2.4.1. " Professional off-road tyre " is a special use tyre primarily used for service in 
severe off-road conditions." 
Paragraphs 2.3. to 2.3.3. (former) , renumber as paragraphs 2.5. to 2.5.3.  
Paragraph 2.3.4.,  renumber as paragraph 2.5.4. and amend to read: 
"2.5.4. " Reinforced " or " Extra Load " means a pneumatic-tyre structure designed to 
carry more load at a higher inflation pressure than the load carried by the 
corresponding standard version tyre at the standard inflation pressure as specified in ISO 4000-1:2010;" 
Paragraphs 2.3.5. to 2.3.7. , renumber as paragraphs 2.5.5. to 2.5.7.  
Paragraphs 2.4. to 2.10.1. (former) , renumber as paragraphs 2.6. to 2.12.1.  
Paragraph 2.11.(former),  renumber as paragraph 2.13. and amend to read: 
"2.13 " Tread pattern groove " means the space between two adjacent ribs or blocks 
in the tread pattern
2;" 
Paragraphs 2.12. to 2.30. (former) , renumber as paragraphs 2.14. to 2.32.  
Paragraph 2.30.1. (former),  renumber as paragraph 2.32.1. and amend to read: 
"2.32.1. " Principal grooves " means the wide circumferential grooves positioned in 
the central zone of the tyre tread, which have the tread-wear indicators 
located in the base." 
Insert a new paragraph 2.33.  to read: 
"2.33. " Void to fill ratio " means the ratio between the area of voids in a reference 
surface and the area of this referen ce surface calculated from the mould 
drawing." 
Paragraphs 2.31. to 2.35 . (former) , renumber as paragraphs 2.34. to 2.38. 
Paragraph 3.1.2.,  amend to read:  
"3.1.2. The tyre-size designation"  มอก. 2718–2558  
                                                              
-6- E/ECE/324/Rev.1/Add. 29/Rev.3/Amend.3  
E/ECE/TRANS/505/Rev.1/ Add.29/Rev.3/Amend.3 
3 Paragraph 3.1.4.,  amend to read: 
"3.1.4. An indication of the tyre's speed category symbol" 
Paragraph 3.1.5.,  amend to read: 
"3.1.5. The inscription M + S or M.S or M&S if the tyre is classified in the category 
of use "snow tyre"." 
Insert a new paragraph 3.1.6.,  to read : 
"3.1.6.  The inscription "ET" and/or "POR" if the tyre is classified in the category of 
use "Special use". 
 ET means Extra Tread and POR m eans Professional Off Road." 
Paragraph 3.1.6. (former),  renumber as paragraph 3.1.7. and amend to read: 
"3.1.7. The load-capacity index;" Paragraphs 3.1.7. to 3.1.9. (former) , renumber as paragraphs 3.1.8. to 3.1.10.  
Paragraph 3.1.10. (former),  renumber as paragraph 3.1.11. and amend to read:
  
"3.1.11. 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 2.19.1.5. sha ll be placed immediately after the rim 
diameter marking referred to in paragraph 2.19.1.3." 
Paragraphs 3.1.11. to 3.1.12.(former),  renumber as paragraphs 3.1.12. to 3.1.13. 
Paragraph 3.4.,  amend to read 
"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 paragraphs 3.1.1. and 3.1.13. above." 
Paragraph 4.1.1.,  amend to read: 
"4.1.1.  The tyre-size designation;" Paragraph 4.1.3.,  amend to read: 
"4.1.3. The category of  use normal tyre or snow tyre , or special use tyre, or for 
temporary use);" 
Paragraph 4.1.14.,  amend to read: 
"4.1.14.  The factor x referred to in paragraph 2.22. above." Paragraph 6.2.2 ., amend to read: 
"6.2.2. A tyre which after undergoing the load/speed test as specified in paragraph 2. 
of Annex 7 does not exhibit any tread separation, ply separation, cord separation, chunking or broken cords shall be deemed to have passed the test." 
Paragraph 6.2.3 ., amend to read: 
"6.2.3. The outer diameter of the tyre, measured six hours after the load/speed 
performance test as specified in paragraph 2. of Annex 7, must not differ by more than ±3.5 per cent from the outer diameter as measured before the test."  มอก. 2718–2558 
 
                                                              
-7-E/ECE/324/Rev.1/Add. 29/Rev.3/Amend.3  
E/ECE/TRANS/505/Rev.1/ Add.29/Rev.3/Amend.3 
4 Insert new paragraph 6.3.,  amend to read: 
"6.3.   Tread pattern of a tyre 6.3.1.   In order to be classified as a "sp ecial use tyre" a tyre shall have a block tread 
pattern in which the blocks are larger and more widely spaced than for normal tyres and have the following characteristics: 
 (a) A tread depth ≥ 11 mm 
 (b) A void-to-fill ratio ≥ 35 per cent 
6.3.2. In order to be classified as a "professional off-road tyre", a tyre shall have all 
of the following characteristics: 
  (a) A tread depth ≥ 11 mm; 
  (b) A void-to-fill ratio ≥ 35 per cent; 
  (c) A maximum speed rating of ≤ Q." 
Paragraph 6.3. (former),  renumber as paragraph 6.3.3.    
Paragraphs 6.3.1. to 6.3.4. (former),  renumber as paragraphs 6.3.3.1. to 6.3.3.4.,   
Annex 1,  Paragraph 5.2.,  amend to read: 
"5.2. Category of use: normal/snow/special use/temporary use
2." 
Annex 3,  amend to read: 
"Annex 3 
  Arrangement of tyre markings 
Paragraph 1. , amend to read: 
 "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.) 
……" Paragraph 3. , amend to read: 
"3. (c) The symbols "TUBELESS", "REINFORCED", "M + S" and "ET" and 
"POR" may be at a distance from the size-designation." 
   
 
  ET; POR c  มอก. 2718–2558  
                                                              
-8- GE.10- E/ECE/324 
E/ECE/TRANS/505Rev.1/Add.29/Rev.3/Amend.2 
   
11 May 2010   
  
AGREEMENT 
 
CONCERNING THE ADOPTION OF UNIFO RM TECHNICAL PRESCRIPTIONS 
FOR WHEELED VEHICLES, EQUIPMENT AND PARTS WHICH CAN BE FITTED 
AND/OR BE USED ON WHEELED VEHI CLES AND THE CONDITIONS FOR 
RECIPROCAL RECOGNITION OF APPR OVALS GRANTED ON THE BASIS OF 
THESE PRESCRIPTIONS / 
 
(Revision 2, including the amendments which entered in to force on 16 October 1995) 
 
_________ 
 
 
Addendum 29 :  Regulation No. 30 
 
Revision 3 - Amendment 2  
 
 
Supplement 16 to the 02 series of amendments - Date of entry into force: 17 March 2010 
  
UNIFORM PROVISIONS CONCERNING TH E APPROVAL OF PNEUMATIC TYRES 
FOR MOTOR VEHICLES AND THEIR TRAILERS 
 
_________ 
 
 
UNITED NATIONS 
 
                                                 
/ Former title of the Agreement: 
Agreement Concerning the Adoption of Uniform Conditions of Approval and Reciprocal Recognition of Approval 
for Motor Vehicle Equipment and Parts, done at Geneva on 20 March 1958. 
   มอก. 2718–2558  
                                          
 
          
-9- E/ECE/324 
E/ECE/TRANS/505  Rev.1/Add.29/Rev.3/Amend.2 
Regulation No. 30  
page 2  
 Paragraph 1.
, amend to read (including the addition of footnote ** /): 
"1. SCOPE  This Regulation covers new pneumatic ty res designed primarily  for vehicles of 
categories M
1, N1, O1 and O 2. */ **/ 
 It does not apply to tyre s designed primarily for: 
(a) The equipment for vintage cars; (b) Competitions. 
  
 
*/ As defined in Annex 7 to the Consolidated  Resolution on the Construction of Vehicles 
R.E.3 (document TRANS/WP.29/78/Rev.1 as last amended by Amend. 4). 
 **
/ This Regulation defines requirements for tyres as a component. It does not limit their 
installation on any categ ories of vehicles." 
----- มอก. 2718–2558  
                                  
 
                  
-10- E/ECE/324
E/ECE/TRANS/505 Rev.1/Add.29/Rev.3/Amend.1 
 
15 January 2008  
 
 
AGREEMENT 
 
CONCERNING THE ADOPTION OF UNIFO RM TECHNICAL PRESCRIPTIONS 
FOR WHEELED VEHICLES, EQUIPMENT AND PARTS WHICH CAN BE FITTED 
AND/OR BE USED ON WHEELED VEHI CLES AND THE CONDITIONS FOR 
RECIPROCAL RECOGNITION OF APPR OVALS GRANTED ON THE BASIS OF 
THESE PRESCRIPTIONS / 
 
(Revision 2, including the amendments that entered into force on 16 October 1995) 
 
_________ 
 
 
Addendum 29 :  Regulation No. 30 
 
Revision 3 - Amendment 1  
 
 
Supplement 15 to the 02 series of amendments - Date of entry into force:  10 November 2007 
  
UNIFORM PROVISIONS CONCERNING TH E APPROVAL OF PNEUMATIC TYRES 
FOR MOTOR VEHICLES AND THEIR TRAILERS 
 
_________ 
 
 
UNITED NATIONS 
 
                                                 
/ Former title of the Agreement: 
 Agreement Concerning the Adoption of Uniform Conditions of Approval and Reciprocal Recognition of Approval for Motor 
Vehicle Equipment and Parts, do ne at Geneva on 20 March 1958. 
 
GE.08- 
มอก. 2718–2558  
                                          
 
          
-11- E/ECE/324 
E/ECE/TRANS/505  Rev.1/Add.29/Rev.3/Amend.1 
Regulation No. 30  
page 2  
 Paragraph 2.10.1.
, amend to read: 
 "2.10.1. However, in case of tyres identified by the "tyre to rim fitm ent configuration" 
(see para. 3.1.10.) symbol "A" or "U", it mean s the area of the tyre which is seating 
on the rim." 
 Paragraph 2.19.1.
, amend to read: 
 "2.19.1. "Tyre to rim fitment configuration
" means the type of rim to which the tyre is 
designed to be fitted.  In the case of non-st andard rims this will be identified by a 
symbol applied to the tyre, for exam ple, "CT", "TR", "TD", "A" or "U"." 
 Paragraph 3.4.1.
, amend to read: 
 "3.4.1. However, for tyres identified by th e "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." 
 Paragraph 6.1.1.3.
, amend to read: 
 "6.1.1.3. However, for tyres identified by th e "tyre to rim fitment configuration" 
(see para. 3.1.10.) symbol "A" or "U",  K shall be taken equal to 0.6." 
 Paragraph 6.1.2.3.
, amend to read: 
 "6.1.2.3. However, for tyres identified by th e "tyre to rim fitment configuration" 
(see para. 3.1.10.) symbol "A" or "U", the outer diameter sha ll be that specified in the 
tyre size designation as shown on the sidewall of the tyre." 
 Paragraph 6.1.4.2.4.
, amend to read: 
 
"6.1.4.2.4. However, for tyres identified by th e "tyre to rim fitment configuration" 
(see para. 3.1.10.) symbol "A" or "U", the overa ll 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 de scriptive note, increased by 20 mm." 
 Paragraph 6.1.5.1.
, amend to read: 
 "6.1.5.1. for sizes listed in Annex 5, and for ty res identified by the "tyre to rim fitment 
configuration" (see para. 3.1.10.) symbol "A" or "U", the nominal section height H 
is ……" 
 มอก. 2718–2558 
 
                                          
 
          
-12- E/ECE/324
E/ECE/TRANS/505 Rev.1/Add.29/Rev.3/Amend.1 
Regulation No. 30 
page 3  
 
  Annex 3, paragraphs 2. and 3. , amend to read: 
 "2. In the particular case of ty res 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 se ction width in mm, 
 
560 is the outer diameter expressed in mm, 
 
R is an indication of the structure of the ty re - 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 pa ragraph 2.17. of this Regulation shall be 
grouped as shown in the above ex amples: 185/70 R 14 and 185-560 R 400A 
or 185-560 R 400U; 
 (b) the service description ……"  
----- 
                  มอก. 2718–2558  
       
 
           
 
                                 
-13-  
   
  
   
  มอก. 2718–2558 
 
       
 
           
 
                                 
-14- E/ECE/324
E/ECE/TRANS/505 Rev.1/Add.29/Rev.3 
29 March 2007  
 
 
GE.07-  AGREEMENT   
 
CONCERNING THE ADOPTION OF UNIFO RM TECHNICAL PRESCRIPTIONS 
FOR WHEELED VEHICLES, EQUIPMENT AND PARTS WHICH CAN BE FITTED 
AND/OR BE USED ON WHEELED VEHI CLES AND THE CONDITIONS FOR 
RECIPROCAL RECOGNITION OF APPR OVALS GRANTED ON THE BASIS OF 
THESE PRESCRIPTIONS / 
 
(Revision 2, including the amendments which entered in to force on 16 October 1995) 
 
_________ 
 
Addendum 29 :  Regulation No. 30 
 
Revision 3  
 
Incorporating all valid text up to: 
Supplement 10 to the 02 series of amendments - Date of entry into force: 13 January 2000 
Corrigendum 1 to Supplement 10 to the 02 series of amendments, subject of Depositary Notification C.N.443.2004.TRE ATIES-1 dated 13 May 2004 
Supplement 11 to the 02 series of amendments - Date of entry into force: 28 December 2000 
Supplement 12 to the 02 series of amendments - Date of entry into force:  20 February 2002 
/ 
Corrigendum 1 to Supplement 12 to the 02 series of amendments, subject of Depositary 
Notification C.N.791.2002.TREATIES-1 dated 1 August 2002 (English and Russian only) 
Supplement 13 to the 02 series of amendments - Date of entry into force:  26 February 2004 
Supplement 14 to the 02 series of amendments - Date of entry into force:  18 January 2006 
 
UNIFORM PROVISIONS CONCERNING TH E APPROVAL OF PNEUMATIC TYRES 
FOR MOTOR VEHICLES AND THEIR TRAILERS 
_________ 
UNITED NATIONS 
 
                                                 
/ Former title of the Agreement: 
 
Agreement Concerning the Adoption of Uniform Conditions of Approval and Reciprocal Recognition of Approval for Motor 
Vehicle Equipment and Parts, do ne at Geneva on 20 March 1958. 
 
/ For New Zealand, the entry into force is 20 April 2002.  
มอก. 2718–2558  
       
 
 
                     
 
                      
-15- E/ECE/324 
E/ECE/TRANS/505  Rev.1/Add.29/Rev.3 
Regulation No. 30  
page 2  
  มอก. 2718–2558 
 
Regulation No. 30  
 
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF PNEUMATIC 
TYRES FOR MOTOR VEHICL ES AND THEIR TRAILERS 
 
CONTENTS 
 
 REGULATION Page
 
 1. Scope ...................................................................................................................... .    5  
2. Definitions...............................................................................................................    5 
3. Markings .................................................................................................................  12 
4. Application for approval .........................................................................................  14 5. Approval .................................................................................................................  15 
6. Requirements ..........................................................................................................  16 7. Modifications of the type of pneumatic tyre and 
 extension of approval ..............................................................................................  21 
8. Conformity of production .......................................................................................  21 9. Penalties for non-conformity of production ............................................................  21 10. Production definitively discontinued ......................................................................  22 11. Transitional provisions ............................................................................................  22 12. Names and addresses of Tec hnical Services  responsible 
 for conducting approval tests and of Administrative Departments ........................  22 
 ANNEXES  Annex 1
 - Communication concerning the approval or extension or refusal or withdrawal of 
approval or production definitely disconti nued of a type of pneumatic tyre for 
motor vehicles pursuant to Regulation No. 30 
 Annex 2
 - Example of the arrangeme nt of the approval mark 
 Annex 3
 - Arrangement of tyre markings 
 Annex 4
 - Load-capacity indices 
  
CONTENTS (continued
)  
       
 
 
                     
 
                      
-16- E/ECE/324
E/ECE/TRANS/505 Rev.1/Add.29/Rev.3 
Regulation No. 30 
page 3   
      มอก. 2718–2558 
 
Annex 5  - Tyre size designation and dimensions 
 Annex 6
 - Method of measuring pneumatic tyres 
 Annex 7
 - Procedure for load/speed performance tests 
    
       
 
 
                                            
-17- E/ECE/324 
E/ECE/TRANS/505  Rev.1/Add.29/Rev.3 
Regulation No. 30  
page 4  
  มอก. 2718–2558 
1.  SCOPE 
 
This Regulation covers new pneumatic ty res designed primarily, but not only, for 
vehicles in categories M 1, O1 and O 2. 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.  "Snow tyre
" means a tyre whose tread pa ttern and whose structure are 
primarily designed to ensure in mud and fresh or melting snow a performance better than that of an ordinary (road-type ) tyre.  The tread pattern of a snow tyre 
generally consists of groove  (rib) and/or solid-block elements more widely spaced 
than on an ordinary (road-type) tyre; 
 2.3.  "Structure
" of a pneumatic tyre means the technical characteristics of the 
tyre's carcass.  The following structur es are distinguished in particular; 
  2.3.1.  "Diagonal
" or "bias-ply " describes a pneumatic-tyre structure in which the ply 
cords extend to the beads and are laid at alternate angles of s ubstantially less than 
90° to the centre line of the tread; 
                                                 
1/ As defined in Annex 7 to the Consolidated  Resolution on the Cons truction of Vehicles 
(R.E.3), (document TRANS/WP.29/78/Rev.1/ Amend.2 as last amended by Amend.4).  
       
 
 
                     
 
                      
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2.3.2  "Bias-belted " describes a pneumatic-tyre structure of diagonal (bia s-ply) type in 
which the carcass is restricted by a be lt comprising two or more layers of 
substantially inextensible cord material la id at alternate angles  close to those of 
the carcass; 
 2.3.3.  "Radial
" describes a pneumatic-tyr e 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 stabilized by an essentially inextensible circumferential belt; 
 2.3.4.  "Reinforced
" or "Extra Load " describes a pneumatic-tyr e structure in which the 
carcass is more resistant than that of the corresponding standard tyre; 
 
2.3.5.  "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; 
 2.3.6.   "T-type temporary use spare tyre
" means a type of temporary use spare tyre 
designed for use at inflation pressures hi gher than those established for standard 
and reinforced tyres; 
 2.3.7.   "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 th e appropriate wheel and in the absence 
of any supplementary component, to s upply the vehicle with  the basic tyre 
functions, at least, at a speed of 80k m/h (50mph) and a distance of 80km when 
operating in flat tyre running mode. 
 2.4.  "Bead
" means the part of a pneumatic tyre wh ich is of such shap e and structure as 
to  fit the rim and hold the tyre on it; 2 /  
 2.5.  "Cord
" means the strands forming the fabric of the plies in the pneumatic tyre; 2 / 
 2.6.  "Ply
" means a layer of rubber-c oated parallel cords; 2 / 
 2.7.  "Carcass
" means that part of a pneumatic tyre  other than the tread and the rubber 
side walls which, when inflated, bears the load; 2 / 
 2.8.  "Tread
" means that part of a pneumatic tyre which comes into contact with the 
ground; 2 / 
 2.9.  "Side wall
" means the part of a pneumatic tyre  between the tread and the bead; 2 / 
 
                                                 
2/ See explanatory figure.  
       
 
 
                                            
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2.10.  "Lower area of tyre " means the area included between the point of maximum 
section width of the tyre and the area de signed to be covered by the edge of the 
rim; 2 / 
 2.10.1.  However, in case of tyres identified by th e "tyre to rim fitment configuration" (see 
para. 3.1.10.) symbol "A", it means the area  of the tyre which is seating on the 
rim. 
 2.11.  "Tread groove
" means the space between two adjacen t ribs or blocks in the tread 
pattern; 2 / 
 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 protecti ve bands or ribs; 2 / 
 2.13.  "Overall width
" means the linear distance between  the outsides of the side walls 
of an inflated pneumatic tyre, incl uding labelling (marking), decoration and 
protective bands or ribs; 2 / 
 2.14.  "Section height
" means a distance equal to half the difference between the outer 
diameter of the tyre and the nominal rim diameter; 2 / 
 2.15.  "Nominal aspect ratio (Ra
)" means the centuple of the number obtained by 
dividing the number expressing the s ection 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; 2 / 
 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 5 to this Regulation; 
 2.17.1.2. the nominal aspect ratio except in the cas e of certain types of  tyre, for which the 
size designation is shown in the first colu mn of the tables in Annex 5 to this 
Regulation, or, depending on the tyre de sign type, the nominal outer diameter 
expressed in mm; 
________________________ 
 
2/ See explanatory figure. 
  
       
 
 
                                            
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2.17.1.3. a conventional number denoting the nomin al 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 sect ion width in case of T-type temporary use 
spare tyres; 
 2.17.1.5. an indication of the tyre to rim fitment configurati on when it differs from the 
standard configuration. 
 2.18.  "Nominal rim diameter
" means the diameter of the rim on which a tyre is 
designed to be mounted;  
 
2.19.  "Rim " means the support for a tyre-and-tube assembly, or for a tubeless tyre, on 
which the tyre beads are seated; 2 / 
 2.19.1.  "Tyre to rim fitment configuration
" means the type of rim to which the tyre is 
designed to be fitted.  In the case of non-st andard rims this will be identified by a 
symbol applied to the tyre, for ex ample, "CT", "TR", "TD" or "A". 
 2.20.  "Theoretical rim
" means the notional rim whose wi dth would be equal to x times 
the nominal section width of a tyre. Th e 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; 
 2.24.  "Cord separation
" means the parting of the cord s 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.  "Tread-wear indicators
" means the projections within the tread grooves designed 
to give a visual indication of the degree of wear of the tread; 
 ________________________ 
 
2/ See explanatory figure. 
  
       
 
 
                     
 
                      
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2.28.  "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. 
 2.29.  "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 indi cators (see para. 2.27.) located inside 
them. 
 2.30.2.  "Secondary grooves
" means the supplementary grooves of the tread pattern which 
may disappear in the course of the tyre's life. 
 
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 ma ximum 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 referen ce to the speed capabi lity of the car to 
which the tyre is fitted. 
 
Maximum speed 
(km/h) 
   
Maximum load rating 
(per cent) 
 
215 220 225 230 235 240   
98.5 97 95.5 94 92.5 91 
   For intermediate maximum speeds linear interpolations of the maximum load 
rating are allowed. 
 2.31.3.  For speeds higher than 240 km/h (tyres classified with speed category symbol 
"W") 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
(per cent) 
 
240 250 260 270 
   
100   95   90   85 
 
  For intermediate maximum speeds linear interpolations of the maximum load 
rating are allowed. 
 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. 
     
       
 
 
                                            
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Maximum speed 
(km/h) 
  Maximum load rating 
(per cent) 
 
270 280 290 300 
   
   100      95      90      85 
 
  For intermediate maximum speeds linear interpolations of the maximum load 
rating are allowed. 
 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 refere nce to the maximum design speed of the 
vehicle to which the ty re is to be fitted. 
 
Maximum speed 
(km/h) 
   
Maximum load rating
(per cent) 
 
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 intermediate speeds between 300 km/h and the maximum speed permitted by the tyre manufacturer, a lin ear interpolation of the maximum load 
rating applies. 
 2.32.  "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. 
 2.33.  "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. 
 2.34.  "Run flat system
" or "Extended mobility system " describes an assembly of 
specified functionally dependant compone nts, including a tyre, which together 
provide the specified performance gran ting the vehicle with the basic tyre 
functions, at least, at a speed of 80 km/h  (50 mph) and a dist ance of 80 km when 
operating in flat tyre running mode.  
       
 
 
                     
 
                      
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2.35.  "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. 
 3.  MARKINGS  3.1.  Pneumatic tyres submitted for approval sh all 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"; 
 3.1.3.3. on bias-belted tyres, the le tter "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 sym bol "W" or "Y" as pa rt 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 cat egory 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 inscri ption "ZR" and the 
tyre shall be marked with a service desc ription consisting of the speed symbol "Y" 
and the corresponding load index.  The serv ice 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;  
       
 
 
                                            
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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 la st two the year of manufacture.  However, this 
marking which may be placed on one side  wall only, shall not be mandatory, on 
any tyre submitted for approval, until two years after the date of entry into force of this Regulation. 3
/ 
 3.1.10.  In the case of tyres first approved afte r the entry into force of Supplement 13 to 
the 02 series of amendments to Regulati on No. 30, the identification referred to in 
paragraph 2.17.1.5. shall be placed immediat ely after the rim diameter marking 
referred to in paragraph 2.17.1.3. 
 3.1.11. In the case of temporary use spare ty res, the words "TEMPORARY USE ONLY" 
in upper case characters  at least 12.7 mm high. 
 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 adequa te space for the approval mar k, as shown in Annex 2 to 
this Regulation. 
 3.3.  Annex 3 to this Regulation gives an example of the arrangement of the tyre 
markings. 
                                                
 
3/  Before 1 January 2000, the date of manuf acture 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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3.4.  The markings referred to in paragraph 3.1. and the approval mark prescribed in 
paragraph 5.4. of this Regulat ion shall be moulded on to or  into the tyres.  They 
shall be clearly legible and situated in th e lower area of the tyre on at least one of 
its side walls, except for the inscript ion 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", the markings ma y be placed anywhere on the outside 
sidewall of the tyre. 
 4.  APPLICATION FOR APPROVAL  4.1.  The application for approval of a type of pneumatic tyre shall be submitted by the 
holder of the trade name or mark or by hi s 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;  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 "r einforced" 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 manufact urer requests the application of Annex 7, 
paragraph 1.3. to this Regulation; 
 4.1.14.  The factor x referred to in paragraph 2.20. above.   
       
 
 
                                            
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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 ca rrying capacity allowed for that maximum 
speed.  The tyre manufacturer must also specify these values in the technical 
literature for the tyre type. 
 4.1.16.  The identification of the bead retenti on rim contours specific  for the "flat tyre 
running mode" of "run flat tyres". 
 4.2.  The application for approval shall be acco mpanied (all in triplicate) by a sketch, 
or a representative photograph, which identif y the tyre tread pa ttern 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.  Dr awings 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 th e type approval. 
 4.3.  The Competent Authority shall verify th e existence of satisfactory arrangements 
for ensuring effective control of the conformity of production before type 
approval is granted. 
 4.4.  Where a tyre manufacturer submits app lication for type approval for a range of 
tyres, it is not considered necessary to ca rry out a load/speed te st on every type of 
tyre in the range.  Worst case selection may be made at the discretion of the 
Approval Authority. 
 5.  APPROVAL  5.1.  If the pneumatic tyre submitted for a pproval in pursuance of this Regulation 
meets the requirements of paragraph 6 below,  approval of that type of tyre shall 
be granted. 
 5.2.  An approval number shall be assigned to each type approved.  Its first two digits 
(at present 02) shall indicate the series of amendments incorporating the most 
recent major technical amendments made to  the Regulation at the time of issue of 
the approval.  The same Contracting Pa rty shall not assign the same number to 
another tyre type cove red by this Regulation. 
 5.3.  Notice of approval or of extension or  refusal or withdrawal of approval or 
production definitively disconti nued of a type of pneumatic tyre pursuant to this 
Regulation shall be communicated to the Parties to the 1958 Agreement applying 
this Regulation, by means of a form conforming to the model in Annex 1 to this Regulation. 
  
       
 
 
                     
 
                      
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5.3.1.  Where type approval is granted for a tyre type suitable for speeds over 300 km/h 
(see paragraph 4.1.15.), the rele vant 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 1 of this Regulation); load carrying 
capacities for intermediate speeds higher th an 300 km/h may also be specified. 
 5.4.  There shall be affixed conspicuously to every pneum atic 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 a pproval mark consisting of: 
 5.4.1.  A circle surrounding the letter "E" followed by the di stinguishing number of the 
country which has granted approval; 4
/  
 
5.4.2.  An approval number.  5.5.  The approval mark shall be cl early legible and be indelible. 
 5.6.  Annex 2 to this Regulation gives an ex ample of the arrangement of the approval 
mark. 
 6.  REQUIREMENTS  6.1.  Dimensions of tyres
 
  6.1.1.   Section width of a tyre
 
                                                 
4/  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 Montenegr o.  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 Unif orm Technical Prescriptions fo r 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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6.1.1.1. The section width shall be calcu lated by the following formula: 
    S  =  S
1 + K(A-A 1), 
   where:     S is the "section width" expresse d in mm and measured on the measuring 
rim;  
S
1 is the "nominal section width" (i n 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; 5 / 
 
A1 is the width (expressed in mm) of the theoretical rim. 
 
A1 shall be taken to equal S 1 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 5 to this Regulation, the section width shall be that 
given opposite the tyre desi gnation in these tables. 
 6.1.1.3. However, for tyres identified by the "t yre to rim fitment configuration" (see 
para. 3.1.10.) symbol "A", 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 diamet er expressed in mm 
 
d is the conventional number defi ned in paragraph 2.17.1.3. above, 
expressed in mm, 5
/ 
H is the nominal section height in mm, equal to: H = 0.01S
1.Ra, 
                                                 
5/ 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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S1 is the nominal section width in mm, and 
 
Ra is the nominal aspect ratio, 
 
all as shown on the side wall of the tyre in the tyre-size designation in conformity with the requirem ents 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 5 to this Regulation the outer diam eter shall be that 
given opposite the "size" de signation in these tables. 
 6.1.2.3. However, for tyres identified by the "t yre to rim fitment c onfiguration" (see 
para. 3.1.10.) symbol "A", the outer diameter  shall be that specified in the tyre 
size designation as shown on the sidewall of the tyre. 
 6.1.3.  Method of measuring pneumatic tyres
 
 
The dimensions of pneumatic tyres shall be measured by the procedure described in Annex 6 to this Regulation. 
 6.1.4.  Tyre section-width specifications
 
 6.1.4.1. The overall width of a tyre may be le ss 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 "tyr e to rim fitment c onfiguration" (see 
para. 3.1.10.) symbol "A", the overall width of the tyre, in the lower area of the 
tyre, equals the nominal width of the ri m on which the tyre is mounted, as shown 
by the manufacturer in the desc riptive note, increased by 20 mm. 
   6.1.5.  Tyre outer-diame ter specifications
 
 
The outer-diameter of a tyre must not be outside the values Dmin and Dmax 
obtained from the following formulae:  
       
 
 
                                            
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Dmin = d + (2H . a) Dmax = d + (2H . b) 
 
where: 
 6.1.5.1. for sizes listed in Annex 5, and for tyre s identified by the "tyre to rim fitment 
configuration" (see para. 3.1.10.) symbol "A ", the nominal section height H is 
equal to: 
 
H = 0.5 (D-d), for references see paragraph 6.1.2. 
 6.1.5.2. for other sizes, not listed in Annex 5, "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"         Radial, Run flat tyre
         Diagonal and Bias Belted  
    for ordinary 
(road type) tyres      1.04       1.08 
 6.1.5.4. for snow tyres the overall diameter (Dma x) established in conformity with the 
above may be exceeded by 1 per cent. 
 6.2.  Load/speed performance test
 
 6.2.1.  The pneumatic tyre shall undergo a load/s peed performance test carried out by the 
procedure described in A nnex 7 to this Regulation. 
 6.2.1.1. 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 para graph 3.1.4.1.).  Another load/speed test 
must be carried out on a sec ond sample of the same tyre type at the load and speed 
conditions specified as maximum by th e tyre manufacturer (see paragraph 4.1.15. 
of 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 
7, at the load and speed conditions ma rked 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  
       
 
 
                     
 
                      
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      มอก. 2718–2558 
type as specified in paragraph 3. of A nnex 7. 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 separa tion, chunking or broken cords shall be 
deemed to have passed the test. 
 6.2.2.1. However, a tyre marked with the sp eed 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, af ter undergoing the test as specified in 
paragraph 3. of Annex 7, does not exhibit a change in the deflected section height, 
compared to the deflected section height at  the start of the te st, higher than 20 per 
cent and retains the tread connected to the two sidewalls, it is deemed to have passed the test. 
 6.2.3.  The outer diameter of the tyre, m easured 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.  Tread-wear indicators
 
 6.3.1.  The pneumatic tyre sha ll include not less than six transverse rows of wear 
indicators, approximately equally spaced an d 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 th e ribs or blocks of the tread. 
 6.3.2.  However, in the case of tyres of dimens ions 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.  The  tread-wear indicators  must  provi de  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. 
 6.3.4.  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. 
   7.  MODIFICATIONS OF THE TY PE OF PNEUMATIC TYRE AND 
EXTENSION OF APPROVAL 
  
       
 
 
                     
 
                      
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7.1.  Every modification of the type of pneumatic tyre shall be notified to the 
Administrative Department which approve d the type of pneumatic tyre.  The 
department may then either: 
 7.1.1.  Consider that the modifications made ar e 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.  A modification of the tread pattern of  the tyre shall not be considered to 
necessitate a repetition of the tests prescr ibed in paragraph 6. of this Regulation.  
 
7.3.  Confirmation or refusal of approval,  specifying the alterations, shall be 
communicated by the procedure specified in paragraph 5.3. above to the Parties to the Agreement which apply this Regulation. 
 7.4.  The Competent Authority issuing the ex tension of approval shall assign a series 
number  for  such  an extensi on  and   inform  thereof  the  other  Parties   to   the 
1958 Agreement applying this Regulati on by means of a communication form 
conforming to the model in Annex 1 to this Regulation. 
 8.  CONFORMITY OF PRODUCTION  
The conformity of production procedures sh all 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 shal l be so manufactured as to conform to 
the type approved, by meeting the require ments set forth in paragraph 6. above. 
 8.2.  The authority which has granted type  approval may at any time verify the 
conformity control methods applied in each production facility.  For each production facility, the normal frequency of these verifica tions shall be at least 
once every two years. 
 9.  PENALTIES FOR NON-CONF ORMITY OF PRODUCTION 
 9.1.  The approval granted in respect of a type of pneumatic ty re pursuant to this 
Regulation may be withdrawn if the requ irements laid down in paragraph 8.1. 
above are not complied with or if the tyre s taken from the series have failed to 
pass the tests prescribed in that paragraph. 
9.2.  If a Contracting Party to the Agreem ent applying this Regulation withdraws an 
approval it has previously granted, it shall forthwith so notify the other  
       
 
 
                     
 
                      
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page 21   
      มอก. 2718–2558 
Contracting Parties applying this Regul ation by means of a communication form 
conforming to the model in Annex 1 to this Regulation. 
 10.  PRODUCTION DEFINITI VELY 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 rece iving the relevant communication that 
authority shall inform thereof the othe r Parties to the 1958 Agreement applying 
this Regulation by means of a communication form conforming to the model in Annex 1 to this Regulation. 
 11.  TRANSITIONAL PROVISIONS 
 
11.1.  Contracting Parties applyi ng this Regulation shall not re fuse 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 Regul ation  shall refuse a tyre approved  to 
the 01 series of amendmen ts 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 applyi ng 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.  NAMES AND ADDRESSES OF TEC HNICAL SERVICES RESPONSIBLE 
FOR CONDUCTING APPROVAL TESTS AND OF ADMINISTRATIVE DEPARTMENTS 
 12.1.  The Parties to the 1958 Agreement which apply this Regulation shall 
communicate to the United Nations Secret ariat 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. 
 12.2.  The Parties to the Agreement which apply this Regulation may designate 
laboratories of tyre manufacturer s as approved test laboratories. 
  
       
 
 
                                            
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page 22  
  มอก. 2718–2558 
12.3.  Where a Party to the Agreement app lies paragraph 12.2. above, it may, if it so 
desires, be represented at the tests by  one or more persons of its choice. 
 
Explanatory figure  
(see paragraph 2 of the Regulation) 
         
 
 
                                            
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page 23 
Annex 1   
      มอก. 2718–2558 
Annex 1  
 
COMMUNICATION 
 
(maximum format:  A4 (210 x 297 mm)) 
  
issued by:  Name of administration: 
 
......................................        ...................................... ...................................... 
 
   
concerning 2
/:          APPROVAL GRANTED 
APPROVAL EXTENDED APPROVAL REFUSED APPROVAL WITHDRAWN PRODUCTION DEFINI TELY DISCONTINUED 
  of a type of pneumatic tyre for motor vehicles pursuant to Regulation No. 30 
 Approval No. .....        Extension No. .....    1. Manufacturer's name or trade mark(s) on the tyre type:  ...........................................................  
 .............................................................................................................................. ......................  
 2. Tyre type designation by  the manufacturer:  .............................................................................  
  
3. Manufacturer's name and address:  .......................................................................................... ..  
 .............................................................................................................................. ......................  
 4. If applicable, name and address of  manufacturer's representative:  ...........................................  
 .............................................................................................................................. ......................  
 5. Summarized description:  ................................................................................................... ........  
 5.1. Tyre size designation:  .................................................................................................. .............    
5.2. Category of use:  normal/snow/temporary use 2
/ 
  
       
 
 
                     
 
                      
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Annex 1 
 มอก. 2718–2558 
5.3. Structure:  diagonal/bias-b elted/radial/run flat tyre 2 / 
 5.4. Speed category symbol:  .................................................................................................. ........ 
 5.5. Load-capacity index:  .................................................................................................... ...........   
 6. Technical Service and, where app licable, test laboratory approved 
 for purposes of approval or of verification of conformity:   .................................................... 
     7. Date of report issued  by that service:  .................................................................................... ..    
 
8. Number of report issued by that service:   ...............................................................................    
 9. Reason(s) of extension (if applicable):   ..................................................................................    
 10. Any remarks:  ............................................................................................................. ..............    
 11. Approval granted/extend ed/refused/withdrawn 2
/ 
 12. Place:  ................................................................................................................... ....................    
 13. Date:  .................................................................................................................... ....................    
 14. Signature:  ............................................................................................................... .................    
 15. Annexed to this communication is a list of doc uments in the approval file deposited at the 
Administrative services having delivered the approval and which can be obtained upon 
request. 
     _______________      
 
1/ Distinguishing number of the country whic h has granted/extended/refused/withdrawn 
approval (see approval provi sions in the Regulation). 
 2
/ Strike out what  does not apply.  
       
 
 
                     
 
                      
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Annex 2   
      มอก. 2718-2558 
Annex 2  
 
EXAMPLE OF THE ARRANGEMEN T OF THE APPROVAL MARK 
     
a
 
2 
 
 
 
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 Neth erlands (E 4) under approval number 022439. 
 Note
:  The first two digits of th e 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 th e circle and either a bove or below the "E" 
or to left or right of that lett er.  The digits of the approval number must be  on the same side of 
the "E" and face in the same direction.  The us e of Roman numerals as approval numbers should 
be avoided so as to prevent any confusion with other symbols.   E4 a a 
3022439 a 
2 a 
3  
       
 
 
                     
 
                      
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page 26  
Annex 3 
 มอก. 2718–2558 
Annex 3  
 
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 4 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 twenty -fifth week of the year 2003. 
 
2. In the particular case of ty res having a tyre to rim fitment configuration "A", the marking 
shall be in the form of the following example : 
  185-560 R 400A     where:   185 is the nominal se ction width in mm, 
  560 is the outer diameter expressed in mm,  
        
 
 
                     
 
                      
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Annex 3   
      มอก. 2718–2558 
 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 is the tyre to rim fitment configuration.   The marking of the load index, speed categor y, date of manufacture and other markings, 
shall be as given in example 1 above. 
 3. The positioning and order of the markings c onstituting the tyre designation shall be the 
following : 
 
 (a) the size designation as defined in pa ragraph 2.17. of this Regulation shall be 
grouped as shown in the above exam ples: 185/70 R 14 and 185-560 R 400A;   
  (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; 
 
(c) the symbols "tubeless", "reinf orced", and "M + S" may be  at a distance from the 
size-designation. 
  
       
 
 
                                            
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page 28  
Annex 4 
       มอก. 2718-2558 
Annex 4  
 
LOAD-CAPACITY INDICES 
 
Li = Load-capacity index kg = Corresponding mass of the vehi cle which is to be carried. 
  
Li  
kg  
Li  
kg Li kg Li  
kg   
0 45   31 109 61 257 91  615
1 46.2 32 112 62 265 92  630
2 47.5 33 115 63 272 93  650
3 48.7 34 118 64 280 94  670
4 50   35 121 65 290 95  690
5 51.5 36 125 66 300 96  710
6 53   37 128 67 307 97  730
7 54.5 38 132 68 315 98  750
8 56   39 136 69 325 99  775
9 58   40 140 70 335 100 800
10 60   41 145 71 345 101 825
11 61.5 42 150 72 355 102 850
12 63   43 155 73 365 103 875
13 65   44 160 74 375 104 900
14 67   45 165 75 387 105 925
15 69   46 170 76 400 106 950
16 71   47 175 77 412 107 975
17 73   48 180 78 425 108 1 000  
18 75   49 185 79 437 109 1 030  
19 77.5 50 190 80 450 110 1 060  
20 80   51 195 81 462 111 1 090  
21 82.5 52 200 82 475 112 1 120  
22 85   53 206 83 487 113 1 150  
23 87.5 54 212 84 500 114 1 180  
24 90   55 218 85 515 115 1 215  
25 92.5 56 224 86 530 116 1 250  
26 95   57 230 87 545 117 1 285  
27 97.5 58 236 88 560 118 1 320  
28 100    59 243 89 580 119 1 360  
29 103    60 250 90 600 120 1 400  
30 106       
 
  
       
 
 
                     
 
                      
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page 29 
Annex 5   
  มอก. 2718–2558 
Annex 5  
 
TYRE SIZE DESIGNAT ION AND DIMENSIONS 
 
Table I .  Tyres in Diagonal Construction  (European tyres) 
 
Size Measuring 
rim width codeOverall 
diameter 1 / 
mm Tyre section 
width 1 / 
mm Nominal rim 
diameter "d" 
mm 
Super Ballon Series     
4.80-10 3.5 490 128 254 
5.20-10 3.5 508 132 254 
5.20-12 3.5 558 132 305 
5.60-13 4 600 145 330 
5.90-13 4 616 150 330 
6.40-13 4.5 642 163 330 
5.20-14 3.5 612 132 356 
5.60-14 4 626 145 356 
5.90-14 4 642 150 356 
6.40-14 4.5 666 163 356 
5.60-15 4 650 145 381 
5.90-15 4 668 150 381 
6.40-15 4.5 692 163 381 
6.70-15 4.5 710 170 381 
7.10-15 5 724 180 381 
7.60-15 5.5 742 193 381 
8.20-15 6 760 213 381 
Low Section Series      
5.50-12 4 552 142 305 
6.00-12 4.5 574 156 305 
7.00-13 5 644 178 330 
7.00-14 5 668 178 356 
7.50-14 5.5 688 190 356 
8.00-14 6 702 203 356 
6.00-15 L 4.5 650 156 381 
Super Low Section 
Series 2/     
155-13/6.15-13 4.5 582 157 330 
165-13/6.45-13 4.5 600 167 330 
175-13/6.95-13 5 610 178 330 
155-14/6.15-14 4.5 608 157 356 
165-14/6.45-14 4.5 626 167 356  
       
 
 
                     
 
                      
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page 30  
Annex 5 
 มอก. 2718–2558 
Size Measuring 
rim width codeOverall 
diameter 1 / 
mm Tyre section 
width 1 / 
mm Nominal rim 
diameter "d" 
mm 
175-14/6.95-14 5 638 178 356 
185-14/7.35-14 5.5 654 188 356 
195-14/7.75-14 5.5 670 198 356 
Ultra Low Section      
5.9-10 4 483 148 254 
6.5-13 4.5 586 166 330 
6.9-13 4.5 600 172 330 
7.3-13 5 614 184 330 
 
_______________  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 codeOverall 
diameter 1 / 
mm Tyre section 
width 1 / 
mm Nominal rim 
diameter "d" 
mm 
125 R 10 3.5 459 127 254 
145 R 10 4 492 147 254 
125 R 12 3.5 510 127 305 
135 R 12 4 522 137 305 
145 R 12 4 542 147 305 
155 R 12 4.5 550 157 305 
125 R 13 3.5 536 127 330 
135 R 13 4 548 137 330 
145 R 13 4 566 147 330 
155 R 13 4.5 578 157 330 
165 R 13 4.5 596 167 330 
175 R 13 5 608 178 330 
185 R 13 5.5 624 188 330 
125 R 14 3.5 562 127 356 
135 R 14 4 574 137 356 
145 R 14 4 590 147 356 
155 R 14 4.5 604 157 356         
 
 
                                            
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page 31 
Annex 5   
  มอก. 2718–2558 
Size Measuring 
rim width codeOverall 
diameter 1 / 
mm Tyre section 
width 1 / 
mm Nominal rim 
diameter "d" 
mm 
165 R 14 4.5 622 167 356 
175 R 14 5 634 178 356 
185 R 14 5.5 650 188 356 
195 R 14 5.5 666 198 356 
205 R 14 6 686 208 356 
215 R 14 6 700 218 356 
225 R 14 6.5 714 228 356 
125 R 15 3.5 588 127 381 
135 R 15 4 600 137 381 
145 R 15 4 616 147 381 
155 R 15 4.5 630 157 381 
165 R 15 4.5 646 167 381 
175 R 15 5 660 178 381 
185 R 15 5.5 674 188 381 
195 R 15 5.5 690 198 381 
205 R 15 6 710 208 381 
215 R 15 6 724 218 381 
225 R 15 6.5 738 228 381 
235 R 15 6.5 752 238 381 
175 R 16 5 686 178 406 
185 R 16 5.5 698 188 406 
205 R 16 6 736 208 406 
 ____________________  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 Overa ll diameter Tyre section width 
280/45 R 415 240 661 281 
 
  
       
 
 
                                            
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Annex 6 
 มอก. 2718-2558 
Annex 6  
 
METHOD OF MEASURING PNEUMATIC TYRES 
 1.1. Mount  the  tyre  on  the  measuring  ri m  specified by the manufacturer pursuant to 
paragraph 4.1.12. of this Regulation and infl ate it to a pressure  of 3 to 3.5 bar. 
 1.2. Adjust the pressure as follows:  1.2.1. in standard bias-belte d tyres:  to 1.7 bar; 
 1.2.2. in diagonal (bias-ply) tyres:  to: 
 
 
 
Ply-rating 
 
Pressure (bar) 
 
   
 
 
L, M, N  
Speed category 
 
P, Q, R, S  
  
  
T, U, H, V 
 
4 6 8 
  
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. 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. 
 3. Readjust the pressure to the le vel specified in paragraph 1.2. above. 
 4. Measure the overall width by cal liper at six equally-spaced po ints, taking the thickness of 
the protective ribs or bands into account.  The highest measurement so obtained is taken 
as the overall width. 
 5. Determine the outer diameter by measuring the maximum circumference and dividing the 
figure so obtained by π (3.1416). 
  
       
 
 
                     
 
                      
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Annex 7   
 มอก. 2718–2558 
Annex 7  
 
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 spar e tyres:  to 4.2 bar. 
 
 
Speed category  
Diagonal (bias-ply) tyres  
Radial/Run flat system  
Bias-belted tyres 
Ply rating Standard Reinforced Standard 
4 6 8 
 L, M, N  
2.3  
2.7  
3.0  
2.4  
2.8  
- 
 P, Q, R, S  
2.6  
3.0  
3.3  
2.6  
3.0  
2.6 
 T, U, H  
2.8  
3.2  
3.5  
2.8  
3.2  
2.8 
 V W Y   
3.0 
- -  
3.4 
- -  
3.7 
- -  
3.0 3.2 
    3.2 1
/  
3.4 3.6 3.6  
- - - 
 
1.3. The manufacturer may request, giving reason s, the use of a test -inflation pressure 
differing from those given under paragraph 1.2. a bove.  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
/ The value of "3.2" in respect of Speed Category "Y" tyres was inadvertently omitted 
from Supplement 5 to the 02 series of amendmen ts 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.   
       
 
 
                                            
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Annex 7 
 มอก. 2718–2558 
 
1.5.  Readjust the tyre pressure to that  specified in paragraph 1.2. or 1.3. above. 
 2.  Carrying out the test
 
 2.1.  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" (s ee 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 corr ected 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 te mperature if the ma nufacturer agrees. 
 2.5.  Carry the test through, without in terruption in conformity with the 
following particulars: 
 2.5.1.  time taken to pass from zero speed to initial test speed:  10 minutes; 
 2.5.2.  initial test speed:  prescribed max imum speed for the type of tyre (see 
para. 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; 
  
       
 
 
                                            
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Annex 7   
 มอก. 2718–2558 
2.5.6.  maximum test speed:  prescribed maxi mum 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. 
 2.5.7.  however, for tyres suitable for maximum speed of 300 km/h (speed 
symbol "Y"), the duration of th e test is 20 minutes at the initial test speed step and 
10 minutes at the last speed step. 
 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 equa l 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 interrupt ions 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 paragra ph 4.1.15. of this Regulation). 
 2.6.2.2. Five minutes at the maximum test speed.  3.  Procedure to asses th e "flat tyre running mode " of "run flat system"
 
 3.1.  Mount a new tyre on the test rim sp ecified by the manufac turer pursuant to 
paragraphs 4.1.12. and 4.1.15. of this Regulation. 
 3.2.  Carry out the procedure as detailed in paragraphs 1.2. to 1.5. above with a 
test room temperature at 38 ºC +
 3 ºC in relation to conditioning the tyre-and-
wheel assembly as detailed in paragraph 1.4. 
 3.3.  Remove the valve insert and wait until the tyre deflates completely. 
 3.4.  Mount the tyre-and-wheel assembly to  a test axle and press it against the 
outer surface of a smooth wh eel 1.70 m ± 1 per cent or  2.0 m ± 1 per cent in 
diameter. 
 3.5.  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.  
 3.6.   At the start of the test, measur e the deflected section height (Z1). 
 3.7.   During the test the temperature of the test  room must be maintained at 38°C ± 3°C.  
       
 
 
                                            
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page 36  
Annex 7 
 มอก. 2718–2558 
 
3.8.  Carry the test through, without interruption in conf ormity 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 th e 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) x 100. 
 4.  Equivalent test methods
 
 
If a method other than that described in paragraphs 2. and/or 3. above is used, its 
equivalence must be demonstrated. 
 
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