มอก. 2720–2558 
 
-1- 
 มาตรฐานผลิตภัณฑ์อุตสาหกรรม  
ยางล้อแบบสูบลมสําหรับรถจักรยานยนต์และโมเปด  
ขอบข่าย 
มาตรฐานผลิตภัณฑ์อุตสาหกรรมนี้ ครอบคลุมเฉพาะยางล้อแบบสูบลมใหม่ ที่ออกแบบมาเพ ื่อใช้สําหรับรถจักรยานยนต์
รถโมเปด  และยานยนต์ประเภท  L /1 
ไม่รวมถึงยางล้อแบบสูบลม สําหรับรถจักรยานยนต์และรถโมเปดท ี่ออกแบบมาสําหรับรถนอกทางสาธารณะ  ซึ่งมี
สัญลักษณ์ NHS (not for highway service) และยางล้อที่ออกแบบเพื่อใช้ในการแข่งขัน 
หมายเหตุ 1. ประเภทยานยนต ์รายละเอียดตาม  มอก.2390 
บทนิยาม 
ความหมายของค ําที่ใช้ในมาตรฐานผล ิตภัณฑ์อุตสาหกรรมนี้ให้เป็นไปตาม  UN Regulation No.75 revision 2 ข้อ 2. 
และที่แก้ไขเพิ่มเติมตาม amendments 1  
เครื่องหมายและฉลาก  
การแสดงเครื่องหมายและฉลากในมาตรฐานผล ิตภัณฑ์อุตสาหกรรมนี้ ให้เป็นไปตาม  UN Regulation No.75 revision 2 
ข้อ 3 ยกเว้นข้อ 3.2 ไม่ใช้ และข้อ 3.4 ไม่ใช้ แต่ให้เป็นไปตามข้อความต่อไปนี้แทน 
3.4 การแสดงเครื่องหมายและฉลากตามข ้อ 3.1 เครื่องหมายมาตรฐานผล ิตภัณฑ์อุตสาหกรรมและเลขท ี่ มอก. (ยกเว้นข้อ 
3.1.1 และ 3.1.13) ต้องประทับบนแม่พิมพ์หรือบนยาง  ให้สามารถอ่านออกได้ง่าย ชัดเจน และต้องแสดงบนแก ้มยาง
อย่างน้อย 1 ด้าน 
คุณลักษณะที่ต้องการ  
คุณลักษณะที่ต้องการในมาตรฐานผล ิตภัณฑ์อุตสาหกรรมนี้ ให้เป็นไปตาม  UN Regulation No.75 revision 2 ข้อ 6.  
การทดสอบ  
การทดสอบและการหาค ่าต่างๆ ในมาตรฐานผล ิตภัณฑ์อุตสาหกรรมนี้ ให้เป็นไปตาม  UN Regulation No.75 revision 2 
ข้อ 6. และ ANNEX ที่เกี่ยวข้อง 
 
  
 
  มอก.2720–2558 
 
-2- 
    Agreement 
  Concerning the Adoption of Unif orm 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 74 – Regulation No. 75   Revision 2 - Amendment 2 
Supplement 15 to the original version of the Regulation – Date of entry into force: 8 October 2015 
  Uniform provisions concerning the approval of pneumatic tyres for 
motor L-category vehicles 
This document is meant purely as documentation tool. The authentic and legal binding text is:  
ECE/TRANS/WP.29/2015/8. 
_________ 
 
UNITED NATIONS 
 
  
 * Former title of the Agreement: Agreement Conc erning 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.  E/ECE/324/Rev.1/Add.74/Rev.2/Amend.2 −E/ECE/TRANS/505/Rev.1/Add.74/Rev.2/Amend.2
   
 
 
9 November 2015 
มอก. 2720-2558  
                                                              
-3-E/ECE/324/Rev.1/Add. 74/Rev.2/Amend.2 
E/ECE/TRANS/505/Rev.1/ Add.74/Rev.2/Amend.2 
2 Title of the Regulation, amend to read:  
"Regulation No. 75 
  Uniform provisions concerni ng the approval of pneumatic 
tyres for L-category vehicles" 
Paragraph 1., amend to read (including the insertion new footnotes 1 and 2):  
  "1.  Scope 
This Regulation applies to new pneumatic tyres for vehicles of category L.1, 2 
However, it does not apply to tyre types designed exclusively for the 
"off-road" use, which are marked "NHS" (Not for highway service) and to 
tyre types designed exclusively for competitions. 
                                                           
1  As defined in the Consolidated Resolution on the Construction of Vehicles (R.E.3.), document 
ECE/TRANS/WP.29/78/Rev.3, para. 2. - www.unece.org/trans/main/wp29/wp29wgs /wp29gen/wp29resolutions.html  
2  This Regulation defines requireme nts for tyres as a component. It  does not limit their installation 
on any categories of vehicles."  
Paragraph 2.1.3., amend to read:  
"2.1.3. … moped, all terrain (AT)." 
Add a new paragraph 2.16.4., to read:  
"2.16.4. The prefix "AT" for all te rrain (AT) tyres (e.g. AT 18x11-8)" 
Add a new paragraph 2.34 ., to read:  
"2.34. AT (all terrain) tyre:  means a low pressure tyre designed primarily for the 
equipment of categories L 6 and L 7." 
Add a new paragraph 3.1.15 ., to read:  
"3.1.15. For all terrain (AT) tyres, the symbol identifying the reference inflation 
pressure as follows: 
Symbol Reference Inflation Pressure (kPa) 
 25 
 35 
 45 
" 
Add a new paragraph 4.1.16 ., to read:  
"4.1.16. For all terrain (AT) tyres, the symbol identifying the reference inflation 
pressure (see paragraph 3.1.15.)." 
Annex 1,  
Paragraph 5.2., amend to read:  
"5.2. …/moped/All Terrain (AT)2 " 
Insert a new paragraph 5.6 ., to read:  
"5.6. For All Terrain (AT) tyres, the sy mbol (stars) identifying the reference 
inflation pressure." มอก. 2720-2558  
                                                              
-4-E/ECE/32/Rev.1/Add. 74/Rev.2/Amend.2 
E/ECE/TRANS/505/Rev.1/ Add.74/Rev.2/Amend.2 
3 Annex 5,  
Add a new Table 8 , to read:  
"Table 8: Tyres for all terrain vehicles (AT) 
Table 8 (1 of 3) 
Tyres for all terrain  vehicles (AT) 
 
Tyre size (1) Measuring rim 
width code  Section width (mm) Overall diameter (mm)  Maximum overall 
width (mm)  Dmin D Dmax 
AT16x6-8 5 154 394 406 418 168 
AT16x7-7 5.5 177 392 406 420 193 
AT16x8-7 6.5 204 392 406 420 222 
AT18x7-7 5.5 177 440 457 474 193 
AT18x7-8 5.5 177 442 457 472 193 
AT18x8-7 6.5 204 440 457 474 222 
AT18x9-8 7 227 442 457 472 247 
AT18x9.5-8 7.5 240 442 457 472 262 
AT18x10-10 8 254 445 457 469 277 
AT18x10-8 8 254 442 457 472 277 
AT18x11-10 9 281 445 457 469 306 
AT18x11-8 9 281 442 457 472 306 
AT18x11-9 9 281 443 457 471 306 
AT19x6-10 5 154 469 483 497 168 
AT19x7-8 5.5 177 466 483 500 193 
AT19x8-8 6.5 204 466 483 500 222 
AT19x9-8 7 227 466 483 500 247 
AT19x10-9 8 254 468 483 498 277 
AT20x7-10 5.5 177 493 508 523 193 
AT20x7-8 5.5 177 490 508 526 193 
AT20x7-9 5.5 177 491 508 525 193 
AT20x8-10 6.5 204 493 508 523 222 
AT20x10-10 8 254 493 508 523 277 
AT20x10-8 8 254 490 508 526 277 
AT20x10-9 8 254 491 508 525 277 
AT20x11-10 9 281 493 508 523 306 
AT20x11-8 9 281 490 508 526 306 
AT20x11-9 9 281 491 508 525 306 
AT21x7-10 5.5 177 516 533 550 193 
AT21x8-9 6.5 204 515 533 551 222 
AT21x10-10 8 254 516 533 550 277 
AT21x10-8 8 254 513 533 553 277 
AT21x11-8 9 281 513 533 553 306 
AT21x11-9 9 281 515 533 551 306 
AT21x12-8 9.5 304 513 533 553 331 
AT22x7-10 5.5 177 541 559 577 193 
AT22x7-11 5.5 177 542 559 576 193 
AT22x7-12 5.5 177 544 559 574 193 
AT22x7-9 5.5 177 539 559 579 193 
AT22x8-10 6.5 204 541 559 577 222 
AT22x9-10 7 227 541 559 577 247 มอก. 2720-2558  
                                                              
-5-E/ECE/324/Rev.1/Add. 74/Rev.2/Amend.2 
E/ECE/TRANS/505/Rev.1/ Add.74/Rev.2/Amend.2 
4 Table 8 (2 of 3) 
Tyres for all terrain vehicles (AT tyres) 
 
Tyre size (1) Measuring rim 
width code  Section width (mm) Overall diameter (mm)  Maximum overall 
width (mm)  Dmin D Dmax 
AT22x9-11 7 227 542 559 576 247 
AT22x9-8 7 227 538 559 580 247 
AT22x10-10 8 254 541 559 577 277 
AT22x10-8 8 254 538 559 580 277 
AT22x10-9 8 254 539 559 579 277 
AT22x11-10 9 281 541 559 577 306 
AT22x11-8 9 281 538 559 580 306 
AT22x11-9 9 281 539 559 579 306 
AT22x12-8 9,5 304 538 559 580 331 
AT22.5x10-8 8 254 550 572 594 277 
AT23x7-10 5.5 177 564 584 604 193 
AT23x8-10 6.5 204 564 584 604 222 
AT23x8-11 6.5 204 566 584 602 222 
AT23x8-12 6.5 204 567 584 601 222 
AT23x10-10 8 254 564 584 604 277 
AT23x10-12 8 254 567 584 601 277 
AT23x10-8 8 254 561 584 607 277 
AT23x11-9 9 281 563 584 605 306 
AT23x12-9 9,5 304 563 584 605 331 
AT24x8-11 6.5 204 590 610 630 222 
AT24x8-12 6.5 204 592 610 628 222 
AT24x9-11 7 227 590 610 630 247 
AT24x9-12 7 227 592 610 628 247 
AT24x10-11 8 254 590 610 630 277 
AT24x11-10 9 281 589 610 631 306 
AT24x11.5-10 9 290 589 610 631 316 
AT24x12-10 9,5 304 589 610 631 331 
AT24x13-9 10.5 330 587 610 633 360 
AT25x8-10 6.5 204 612 635 658 222 
AT25x8-12 6.5 204 615 635 655 222 
AT25x8-13 6.5 204 617 635 653 222 
AT25x10-10 8 254 612 635 658 277 
AT25x10-12 8 254 615 635 655 277 
AT25x11-10 9 281 612 635 658 306 
AT25x11-12 9 281 615 635 655 306 
AT25x11-9 9 281 611 635 659 306 
AT25x11.5-9 9 290 611 635 659 316 
AT25x12-10 9,5 304 612 635 658 331 
AT25x12-9 9,5 304 611 635 659 331 
AT25x13-9 10.5 330 611 635 659 360 มอก. 2720-2558  
                                                              
-6-E/ECE/32/Rev.1/Add. 74/Rev.2/Amend.2 
E/ECE/TRANS/505/Rev.1/ Add.74/Rev.2/Amend.2 
5 Table 8 (3 of 3) 
Tyres for all terrain vehicles (AT tyres) 
 
Tyre size (1) Measuring rim 
width code  Section width (mm) Overall diameter (mm)  Maximum overall 
width (mm)  Dmin D Dmax 
AT26x9-12 7 227 639 660 681 247 
AT26x10-12 8 254 639 660 681 277 
AT26x10.5-12 8.5 268 639 660 681 292 
AT26x12-10 9.5 304 636 660 684 331 
AT26x12-12 9.5 304 639 660 681 331 
AT26x12-14 9.5 304 642 660 678 331 
AT27x9-12 7 227 663 686 709 247 
AT27x11-12 9 281 663 686 709 306 
AT27x12-10 9.5 304 660 686 712 331 
AT27x12-12 9.5 304 663 686 709 331 
(1) Tyres in Radial construction are identified by the letter "R" in place of "-" (e.g. AT16x6 R 8).  In 
case of Tyre Size designations not included in this table, refer to any edition of one of the following 
International Tyre Standards for the relevant dimensional data: 
(a) The European Tyre and Rim Technical Organisation (ETRTO) 'Standards Manual'; 
(b) The Tire and Rim Association Inc. (TRA) 'Year Book'; 
(c) The Japan Automobile Tire Manufactur ers Association (JATMA) 'Year Book'; or 
(d) The Scandinavian Tyre and Rim Organisation (STRO) 'Data Book'. 
In that case the nominated International Tyre Standard, to which the tyre conforms, shall be specified 
in the application for approval." 
Annex 6,  
Paragraph 1., the table, add the following tyres to the table:  
" 
 Tyre version Speed Category Pressure (bar) Pressure (kPa) 
All Terrain (AT)  all 0.25 25 
 all 0.35 35 
 all 0.45 45 
" 
Annex 7,  
Paragraph 1.2., the table, add the following tyres to the table:  
" 
 Tyre version Speed Category Inflation pressure  
(bar) (kPa) 
All Terrain (AT)  all 0.25 25 
 all 0.35 35 
 all 0.45 45 
" มอก. 2720-2558  
                                                              
-7-E/ECE/324/Rev.1/Add. 74/Rev.2/Amend.2 
E/ECE/TRANS/505/Rev.1/ Add.74/Rev.2/Amend.2 
6 Annex 8,  
Add a new table, to read: 
"Table for all terrain  tyres (AT) with speed symbol "F"  
Speed (km/h) Variation in load carrying capacity (%) 
50 and below + 12 
60 + 7 
70 + 3 
80 0 
90 - 5 
100 - 10 
110 - 15 
120 - 20 
130 - 25 
" 
    
 มอก. 2720-2558  
                                                              
-8- 
GE.15- 
มอก. 2720–2558
  Agreement 
  Concerning the Adoption of Unif orm 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 74 – Regulation No. 75   Revision 2 - Amendment 1 
Supplement 14 to the original version of the Regulation – Date of entry into force: 22 January 2015 
  Uniform provisions concerning the approval of pneumatic tyres for 
motor cycles and mopeds 
 
_________ 
 
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.  E/ECE/324/Rev.1/Add.74/Rev.2/Amend.1 −E/ECE/TRANS/505/Rev.1/Add.74/Rev.2/Amend.1
   
  3 February 2015 
 
                                                              
-9-E/ECE/324/Rev.1/Add. 74/Rev.2/Amend.1 
E/ECE/TRANS/505/Rev.1/ Add.74/Rev.2/Amend.1 
2 มอก. 2720–2558 
 
Annex 7, 
Paragraph 2.5.2., amend to read:  
"2.5.2. Initial test speed: 30 km/h less than the speed corresponding to the speed 
category symbol marked on the tyre  (see paragraph 2.28.2. of this 
Regulation) if a 2.0 m diameter test drum is used, or 40 km/h less if a 1.7 m 
diameter test drum is used." 
Paragraph 2.5.2.1.,  amend to read:  
"2.5.2.1. The initial test speed for the second test in case of tyres suitable for speeds 
above 240 km/h for tyres identified by means of letter code "V" within the 
size designation (or 270 km/h for tyres identified by means of letter code "Z" within the size designation) is 30 km/h less than the maximum speed 
specified by the tyre manuf acturer (see paragraph 4.1.15. of this Regulation) 
if a 2.0 m diameter test drum is used, or 40 km/h less if a 1.7 m diameter test drum is used." 
Insert a new paragraph 2.5.6.1. to read:  
"2.5.6.1. The maximum test speed for the second test in case of tyres suitable for 
speeds above 240 km/h for tyres identified by means of letter code "V" 
within the size designation (or 270 km/h for tyres identified by means of 
letter code "Z" within the size designation) is the maximum speed specified by the tyre manufacturer (see paragraph 4.1.15. of this Regulation) if a 2.0 m 
diameter test drum is used, or 10 km/h less if a 1.7 m diameter test drum is 
used." 
Paragraph 2.6.1., amend to read:  
"2.6.1. Twenty minutes to build up from zero to the initial test speed as specified in 
paragraph 2.5.2.1. above." 
Paragraph 2.6.3., amend to read: 
"2.6.3.  Ten minutes to build up to the maximum test speed as specified in paragraph 
2.5.6.1. above." 
   
 
  
                                                              
-10- 
GE.12- 
มอก. 2720–2558
  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 74: Regulation No. 75  
  Revision 2 – Corrigendum 1  
Corrigendum 1 to Revision 2 of the Regula tion, subject of Depositary Notification 
C.N.785.2011.TREATIES-1 dated 5 January 2012  
  Uniform provisions concerning the approval of pneumatic tyres for 
motor cycles and mopeds 
   
 
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. E/ECE/324/Rev.1/Add.74/Rev.2/Corr.1 −E/ECE/TRANS/505/Rev.1/Add.74/Rev.2/Corr.1
   
 31 January 2012  
                                                               
-11-E/ECE/324/Rev.1/A dd.74/Rev.2/Corr.1 
E/ECE/TRANS/505/Rev.1/ Add.74/Rev.2/Corr.1 
2  มอก. 2720–2558 
Paragraph 6.2.1.1., replace  "paragraph 3.1.12." by "paragraph 3.1.14." 
Annex 3,  
Arrangement of tyre markings, subparagraph (d), replace  "paragraph 3.1.12." by 
"paragraph 3.1.14."  
Annex 5,  
Table 1, replace  "Largeur hors tout maximale" by "Maximum overall width" 
Tables 2 to 7, column 5, the header, replace  "Section width" by "Maximum overall width" 
Annex 6,  Paragraph 1., the table, replace "F à P" by "F to P" and "F à M" by "F to M". 
  
 
  
                                                              
-12-GE.10- 
  Agreement 
Concerning the Adoption of Uniform Techni cal Prescriptions for Wheeled Vehicles, 
Equipment and Parts which can be Fitted an d/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 74: Regulation No. 75 
  Revision 2 
Incorporating: Corrigendum 1 to Revision 1 of the Regulati on referred to in Depositary Notification 
C.N.432.1997.TREATIES-102 of 7 November 1997 Supplement 8 to the Regulation in its original form - Date of entry into force: 7 May 1998  Supplement 9 to the Regulation in its original form - Date of entry into force: 7 February 1999 Supplement 10 to the Regulation in its original form - Date of entry into force: 5 December 2001 Supplement 11 to the Regulation in its original form - Date of entry into force: 16 July 2003 Corrigendum 2 to Revision 1 of the Regulati on referred to in Depositary Notification 
C.N.555.2005.TREATIES-1 of 15 July 2005 Supplement 12 to the Regulation in its original form - Date of entry into force: 3 February 2008 
Supplement 13 to the Regulation in its original form - Date of entry into force: 24 October 2009 
Uniform provisions concerning the approval of pneumatic tyres for motor cycles and 
mopeds 
_______________ 
 
 
NATIONS UNIES
 
 
 * 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.  E/ECE/324/Rev.1/Add.74/Rev.2 −E/ECE/TRANS/505/Rev.1/Add.74/Rev.2
   
7 September 2010 มอก. 2720–2558  
                                                              
-13- 
 มอก. 2720–2558  
                                                              
-14-E/ECE/324/Rev.1/ Add.74/Rev.2 
E/ECE/TRANS/505/Re v.1/Add.74/Rev.2 
 
 3 มอก. 2720–2558
 Regulation No. 75 
  Uniform provisions concerni ng the approval of pneumatic 
tyres for motor cycles and mopeds 
Contents 
 Page  
 1. Scope ..................................................................................................................... ...........................  4 
 2. Definitions ............................................................................................................... .........................  4 
 3. Markings .................................................................................................................. ........................  9 
 4. Application for approval .................................................................................................. ................  10 
 5. Approval  ................................................................................................................. .........................  11 
 6. Requirements .............................................................................................................. .....................  12 
 7. Modifications of the type of pneumatic  tyre and extension of approval ..........................................  14 
 8. Conformity of production................................................................................................... ..............  15 
 9. Penalties for non-conf ormity of produc tion ................................................................................ .....  15 
 10. Production defin itely disc ontinued ....................................................................................... ............  15 
 11. Names and addresses of technical services responsible for conducting  
  approval tests, and of administrative departments............................................................................   16 
 Annexes  1. Communication concerning the approval or extension or refusal or withdraw  
  of approval or production definitely discontinued of a type of pneumatic   tyre for motor cycles and mopeds pursuant to Regula tion No. 75 ...................................................  18 
 2. Arrangement of the approval mark .......................................................................................... ........  20 
 3. Arrangement of tyre markings – Example of the markings to be borne by types 
  of tyres placed on the market after the entry into for ce of this Regu lation ......................................  21 
 4. Load capacity index/maxi mum mass correspondence .....................................................................  22 
 5. Tyre size designa tion and dime nsions ...................................................................................... ........  24 
 6. Method of measur ing pneumatic  tyres ....................................................................................... ......  34 
 7. Procedure for load/s peed performance tests ................................................................................ .....  35 
 8. Tyre load capacitie s at various speeds .................................................................................... .........  38 
 9. Test procedure for the dynamic growth  of tyres ............................................................................ ..  39  
                                                              
-15-E/ECE/324/Rev.1/ Add.74/Rev.2 
E/ECE/TRANS/505/Re v.1/Add.74/Rev.2 
 
4  มอก. 2720–2558 
  1.  Scope 
  This Regulation applies to new pneumatic tyres for vehicles of category L 1, 
  L 2, L3, L4 and L 5. 
 However, it does not apply to tyre types designed exclusively for the  
"off-road" use, which are marked "NHS" (Not for Highway Service) and to tyre types designed exclusively for competitions. 
  2.  Definitions 
 For the purpose 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 (normal: for normal highway service; special: for special 
applications such as on-and off-the-road, snow, moped); 
2.1.4. Structure (diagonal or bias-ply, bias belted, radial); 2.1.5. Speed category; 2.1.6. Load capacity index; 2.1.7. Tyre cross-section. 2.2. " Structure of a pneumatic tyre " means the technical characteristics of the 
tyre's carcass. The following structures of a pneumatic tyre 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 centre line of the tread.
1 
2.2.2. " Bias belted " describes a pneumatic tyre structure of diagonal (bias-ply) type 
in which the carcass is restricted by a belt comprising two or more layers of substantially inextensible cord material laid at alternate angles close to those of the carcass. 
2.2.3. " Radial " describes a pneumatic tyre struct ure in which the ply cords extend 
to the beads and are laid substantially at 90  to the centreline of the tread, the 
carcass being stabilized by an essentially inextensible circumferential belt.
1 
2.2.4. " Reinforced " describes a pneumatic tyre structure in which the carcass is 
more resistant than that of the corresponding normal tyre. 
2.3. " Bead " means the part of a pneumatic tyre which is of such shape and 
structure as to fit the rim and hold the tyre on it.2 
  
 1 Applicable also to Regulation No. 54 
 2  See the explanatory figure in the appendix.  
                                                              
-16-E/ECE/324/Rev.1/ Add.74/Rev.2 
E/ECE/TRANS/505/Re v.1/Add.74/Rev.2 
 
 5 มอก. 2720–2558
2.4. " Cord " means the strands forming the fabric of the plies in the pneumatic 
tyre.2 
2.5. " Ply" means a layer of rubber-coated parallel cords.2 
2.6. " Carcass " means that part of a pneumatic tyre other than the tread and the 
rubber side walls which, wh en inflated, bears the load.2 
2.7. " Tread " means that part of a pneumatic tyre which comes into contact with 
the ground, protects the carcass agains t mechanical damage and contributes 
to ground adhesion.2 
2.8. " Side wall " means the part of a pneumatic ty re between the tread and the area 
designed to be covered by the rim flange.2 
2.9. " Tread groove " means the space between two adjacent ribs or blocks in the 
tread pattern.2 
2.10. " Principal groove " means the wide grooves situated  in the central zone of the 
tread. 
2.11. " Section width (S) " means the linear distance betw een the outsides of the side 
walls of an inflated pneumatic tyre, excluding elevations due to labelling (marking), decoration or protective bands or ribs.
2 
2.12. " Overall width " means the linear distance betwee n the outsides of the side 
walls of an inflated pneumatic tyre, including labelling (marking), decoration and protective bands or ribs;
2 in the case of tyres where the tread is wider 
than the section width, the overall width corresponds to the tread width. 
2.13. " Section height (H) " means a distance equal to half the difference between 
the outer diameter of the tyre  and the nominal rim diameter.2 
2.14. " Nominal aspect ratio (Ra) " means the centuple of the number obtained by 
dividing the number expressing the section height (H) by the number expressing the nominal section width (S
1), both dimensions expressed in the 
same units. 
2.15. " Outer diameter (D)" means the overall diam eter of an inflated new 
pneumatic tyre.2 
2.16. " Tyre-size designation " is a designation showing: 
2.16.1. The nominal section width (S 1) must be expressed in mm except in the case 
of types of tyre for which the size designation is shown in the first column of the tables in annex 5 to this Regulation; 
2.16.2. The nominal aspect ratio, except in the case of certain types of tyre, for which 
the size designation is shown in the first column of the tables in annex 5 to this Regulation; 
2.16.3. A conventional number "d" denoting the nominal diameter of the rim and 
corresponding to its diameter expressed either by code (numbers below 100) or in millimetres' (numbers above 100).  
                                                              
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2.16.3.1. The values in millimetres of the sy mbol "d" when indicated by a code are as 
follows: 
Symbol "d" indicated by one or two figures according
 to the nominal rim diameter Value of "d" in mm 
4 102 
5 127 
6 152 
7 178 
8 203 
9 229 
10 254 
11 279 
12 305 
13 330 
14 356 
15 381 
16 406 
17 432 
18 457 
19 483 
20 508 
21 533 
22 559 
23 584 
2.17. " Nominal rim diameter (d)" means the diameter of the rim on which a tyre is 
designed to be mounted.2 
2.18. " Rim" means the support for a tyre-and-tube assembly, or for a tubeless tyre, 
on which the tyre beads are seated.2 
2.18.1. " Tyre to rim fitment configuration " means the type of rim to which the tyre is 
designed to be fitted. In the case of non-standard rims this will be identified 
by a symbol applied to the tyre. 
2.19. " Theoretical rim " means the rim whose width would be equal to X times the 
nominal section width of a tyre. The value of X shall be specified by the manufacturer of the tyre. 
2.20. " Measuring rim " means the rim on which a tyre is required to be fitted for 
size measurements. 
2.21. " Test rim " means the rim on which a tyre is re quired to be fitted for testing. 
2.22. " Chunking " means the breaking away of pi eces of rubber from the tread. 
2.23. " Cord separation " means the parting of the cord s from their rubber coating. 
2.24. " Ply separation " means the parting of adjacent plies. 
2.25. " Tread separation " means the pulling away of the tread from the carcass.  
                                                              
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2.26. " Load capacity index " means a figure associated  with the maximum load a 
tyre can carry at the speed corresponding  to its speed symbol according to the 
operating conditions specified by the tyre manufacturer. A list of those indices and of the corresponding loads is given in annex 4 to this Regulation. 
2.27. " Table of tyre load capacities at various speeds " means the table in annex 8 
which shows, by reference to indices of load capacity and of capacity at 
nominal speed, load variations of a tyre  if used at speeds other than that 
corresponding to the index of  its nominal speed category. 
2.28. " Speed category " means: 
2.28.1. The speeds, expressed by the speed category symbol as shown in the table in 
paragraph 2.28.2. 
2.28.2. The speed categories are as shown in the table below: 
Speed category symbol Corresponding speed (km/h) 
B 50 
F 80 
G 90 
J 100 
K 110 
L 120 
M 130 
N 140 
P 150 
Q 160 
R 170 
S 180 
T 190 
U 200 
H 210 
V 240 
W 270 
2.28.3. Tyres suitable for maximum speeds in excess of 240 km/h are identified by 
means of letter codes "V" or "Z" (see paragraph 2.33.3.) placed within the 
tyre size designation in front of the indications of the structure (see paragraph 3.1.3.). 
2.29. " 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.  
                                                              
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2.30. " MST " means "multiservice tyre", suitable both on and off road. 
2.31.  " Moped tyre " means a tyre designed for the equipment of mopeds (categories 
  L 1 and L 2). 
2.32. " Motor cycle tyre " means a tyre designed prim arily for the equipment of 
motor cycles (categories L 3, L 4 and L 5). However, they may also equip 
mopeds (categories L 1 and L 2) and light trailers (category 01). 
2.33. " Maximum load rating " means the maximum mass the tyre is rated to carry. 
2.33.1. For speeds lower or equal to 130 km/h, the maximum load rating must not 
exceed the percentage of the value associ ated with the rele vant load capacity 
index of the tyre as indicated in the table "Load capacity variation with speed" (see paragraph 2.27.) with reference to the speed category symbol of the tyre and the speed capability of the vehicle to which the tyre is fitted. 
2.33.2. For speeds above 130 km/h but no t exceeding 210 km/h, the maximum load 
rating must not exceed the value of the ma ss associated with the load capacity 
index of the tyre. 
2.33.3. For speeds above 210 km/h but no t exceeding 270 km/h, the maximum load 
rating must not exceed the percentage of  the mass, associated with the load 
capacity index of the tyre, indicated in the table below with reference to the 
speed category symbol of the tyre and the maximum design speed of the vehicle to which the tyre is to be fitted: 
Maximum speed km/h *** Charge maximale (%) 
Symbole de la catégorie de vitesse V  Symbole de la catégorie de vitesse W ** 
210 100  100 
220 95 100 
230 90 100 
240 85 100 
250 (80)* 95 
260 (75)* 85 
270 (70)* 75 
* Applicable only to tyres identified by means of letter code "V" within the size designation and 
up to the maximum speed specified by the tyre manufacturer. 
** Applicable also to tyres identified by means of letter code "Z" within the size designation. *** For intermediate speeds linear interpola tion of maximum load rating is allowed. 
2.33.4. For speeds in excess of 270 km/h , the maximum load rating must not exceed 
the mass specified by the tyre manufact urer with reference to the speed 
capacity of the tyre.  
 For intermediate speeds between 270 km/h and the maximum speed 
permitted by the tyre manufacturer, a linear interpolation of the maximum load rating applies.  
                                                              
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  3.  Markings 
3.1. Pneumatic tyres submitted for approval shall bear on at least one side wall 
the following markings: 
3.1.1. The trade name or mark; 3.1.2. The tyre size designation as defined in paragraph 2.16. 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", 3.1.3.2. On bias-be lted tyres, the letter "B" placed in front of the rim-diameter 
marking, and in addition the wo rds "BIAS-BELTED" can be added, 
3.1.3.3. On radial-ply tyres, the letter "R" placed in front of the rim-diameter 
marking, and, the word "RADIAL" can be added, 
3.1.4. An indication of the tyre's speed category by means of the symbol shown in 
paragraph 2.28.2. above; 
3.1.5. The load-capacity index as defined in paragraph 2.26. above; 3.1.6. The word "TUBELESS" if the tyre is designed for use without an inner tube; 3.1.7. The word "REINFORCED" or "REINF " if the tyre is a reinforced tyre; 
3.1.8. The date of manufacture in the form of a group of four digits, the first two 
showing the week and the last two the year of manufacture. This marking, 
may be affixed to one side wall only. 
3.1.9. The inscription of "M + S" or "M.S" or "M & S" in the case of a snow tyre. 
The inscription "DP" (I.E. Dual Pu rpose) is accepted as a permitted 
alternative. 
3.1.10. The inscription MST in the case of multiservice tyres. 3.1.11. The inscription "MOPED" (or alternatively "CYCLOMOTEUR" or 
"CICLOMOTORE") in the case of moped tyres. 
3.1.12. An identification of the tyre to rim fitment configuration, when it differs from 
the standard configurati on, immediately after the rim diameter marking 
referred to in paragraph 2.16.3. of this Regulation. 
 In the case of tyres intended to be fitted to rims having a diameter equivalent 
to code 13 (330 mm) or above, this inscription shall be "M/C". This requirement shall not apply to any tyre sizes listed in the tables of annex 5 to this Regulation. 
3.1.13. Tyres suitable for speeds above 240 km/h must be marked with the 
appropriate letter code "V" or "Z", as  applicable (see paragraph 2.33.3.) in 
front of the indication of the structure (see paragraph 3.1.3.) 
3.1.14. Tyres suitable for speeds above 240 km/h or (270 km/h respectively) must 
bear, within parenthesis, the marking of the load capacity index (see paragraph 3.1.5.) applicable at a speed of 210 km/h (or 240 km/h respectively) and a reference speed categ ory symbol (see paragraph 3.1.4.) as 
follows:  
                                                              
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 "V" in case of tyres identified with the letter code "V" within the size 
designation. 
 "W" in case of tyres identified with  the letter code "Z" within the size 
designation. 
3.2. Tyres shall provide adequate space for the approval mark, as shown in 
annex 2 to this Regulation. 
3.3. Annex 3 to this Regulation gives an example of the tyre markings. 3.4. The markings referred to in paragraph 3.1. and the approval mark prescribed 
in paragraph 5.4. of this Regulation shall be moulded on, to or into the tyres. They shall be clearly legible. 
  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 his duly accredited 
representative. It shall specify: 
4.1.1. The tyre-size designation as defined in paragraph 2.16. of this Regulation; 4.1.2. The trade name or mark; 4.1.3. The category of use (normal, special, snow or moped); 4.1.4. Structure: diagonal (bias ply), bias belted or radial; 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 "normal" or "reinforced"; 4.1.9. The ply-rating number of tyres fo r motor cycle derivatives (see table 5 of 
annex 5 to this Regulation);
3 
4.1.10. The overall dimensions: overall section width, and overall 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 and measurement pressures; 4.1.14. The factor X referred to in paragraph 2.19. above; 4.1.15. For tyres identified by means of letter code "V" within the size designation 
and suitable for speeds over 240 km/h or for tyres identified by means of letter code "Z" within the size designation and suitable for speeds over 270 km/h, the maximum speed permitted by the tyre manufacturer and the load carrying capacity allowed for that maximum speed. 
 
 
 3 From the date of entry into fo rce of Supplement 8 to this Regulat ion no new approvals for these tyres 
should be issued pursuant to Regulation No. 75. These tyre sizes are now included in 
Regulation No. 54.  
                                                              
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4.2. The application for ap proval shall be accompanie d (all in triplicate) by a 
sketch, or a representative photograph, which identify the tyre tread pattern and a sketch of the envelope of the inflated tyre mounted on the measuring rim showing the relevant dimensions (see paragraphs 6.1.1. and 6.1.2.) of the type submitted for approval. It shall al so be accompanied either by the test 
report issued by the approved test laboratory or by one or two samples of the tyre type, at the discretion of the competent authority. Drawings or photographs of the side wall and tread of the tyre shall be submitted once production has been established, no later than one year after the date of issue of the type approval. 
4.3. Where a tyre manufacturer submits application for type approval for a range 
of tyres, it is not considered necessary to carry out a load/speed test on every type of tyre in the range. Worst case selection may be made at the discretion 
of the approval authority.  
  5.  Approval 
5.1. If the pneumatic tyre submitted for approval in pursuance of this Regulation 
meets the requirements of paragraph 6 be low, approval of that type of tyre 
shall be granted. 
5.2. An approval number shall be assign ed to each type approved. Its first two 
digits (at present 00 for the Regulation in its original form) shall indicate the series of amendments incorporatin g the most recent major technical 
amendments made to the Regulation at the time of issue of the approval. The number so assigned shall not be assigned by the same Contracting Party to another type of pneumatic tyre. 
5.3. Notice of approval or of extension or of refusal or withdrawal of approval of 
a type of pneumatic tyre pursuant to this Regulation shall be communicated to the Parties to the Agreement applying this Regulation, by means of a form conforming to the model in annex 1 to this Regulation. 
5.3.1. For tyres suitable for speeds above 240 km/h, the maximum speed permitted 
and the relevant load rating are specified under item 10. of annex 1. 
5.4. There shall be affixed conspicuously to every pneumatic tyre conforming to a 
type of tyre approved under this Regulation, in the space referred to in paragraph 3.2. above, and in addition to the markings prescribed in paragraph 3.1. above, an international approval mark consisting of:  
                                                              
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5.4.1. A circle surrounding the letter "E" followed by the distinguishing number of 
the country which has granted approval;4 
5.4.2. The number of this Regulation, followed by the letter "R", a dash and the 
type approval number. 
5.5. The approval mark shall be clearly legible and be indelible. 5.6. Annex 2 to this Regulation gives an example of the arrangement of the 
approval mark. 
  6.  Requirements 
6.1.  Dimensions of tyres 
6.1.1.  Section width of a tyre 6.1.1.1. The section width is obtained by means of the following formula: 
S = S
1 + K(A-A 1) 
  where: 
  S is the "section width" expressed in millimetres and measured on the 
  measuring rim; 
  S 1 is the "nominal section width" (in millimetres) as shown on the side 
  wall of the tyre in the design ation of the tyre as prescribed; 
  A is the width (expressed in millimetres) of the measuring rim, as shown 
  by the manufacturer in the descriptive note;  
  A 1 is the width (expressed in millim etres) of the theoretical rim; 
  A 1 shall be taken to equal S 1 multiplied by the Factor X specified by the 
   manufacturer,  
  K shall be taken to equal 0.4. 6.1.1.2. However, for types of tyres for which the size designation is shown in the 
  first column of the tables in annex 5 to this Regulation, the section width   shall be allowed to be that given opposite the tyre designation in the tables. 
 
 
 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 Sp ain, 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 a nd Herzegovina, 32 for Latvia, 33 (vacant), 34 for 
Bulgaria, 35 (vacant), 36 for Lithuania, 37 for Tu rkey, 38 (vacant), 39 for Azerbaijan, 40 for The 
former Yugoslav Republic of Ma cedonia, 41 (vacant), 42 for the European Union (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), 56 for 
Montenegro, 57 (vacant) and 58 for Tunisia. Subseque nt numbers shall be assigned to other countries 
in the chronological order in which they ratify or accede to the Agreement Concerning the Adoption 
of Uniform Technical Prescriptions for Wheeled Vehicles, Equipment and Parts which can be Fitted and/or be Used on Wheeled Vehicles and the Co nditions for Reciprocal Re cognition of Approvals 
Granted on the Basis of these Prescriptions, and th e numbers thus assigned sh all be communicated by 
the Secretary-General of the United Nations to the Contracting Parties to the Agreement.  
                                                              
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6.1.2.  Outer diameter of a tyre 
6.1.2.1. The outer diameter of a tyre is ob tained by means of the following formula: 
D = d + 2H 
D is the outer diameter expressed in millimetres; d is the conventional number defined in paragraph 2.16.3. above 
expressed in millimetres; 
H is the nominal section height in millimetres and is equal to   H = S
1 x 0.01 Ra, where 
  S 1  is the nominal section width (in millimetres); and 
  Ra  is the nominal aspect ratio, all as shown on the side wall of the tyre  in the tyre designation in conformity 
with the requirements of paragraph 3.4. above. 
6.1.2.2. However, for types of tyres for which the size designation is shown in the 
first column of the tables in annex 5 to this Regulation, the outer diameter shall be allowed to be that given opposite the tyre designation in the tables. 
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 less than the section width S determined 
  pursuant to paragraph 6.1.1. above. 
6.1.4.2. It may exceed  that value up to the value shown in annex 5 or for sizes not 
  included in annex 5 by the following percentages: 
6.1.4.2.1. For normal and snow service:  
 (a) rim diameter code 13 and above: +10 per cent   (b) rim diameter codes up to 12 inclusive: +8 per cent 
6.1.4.2.2. For special service tyres which are suitable for limited road use and are 
marked MST: 25 per cent. 
6.1.5.  Tyre outer-diameter specifications 6.1.5.1. The outer diameter of a tyre must not be outside the values Dmin and Dmax 
  specified in annex 5. 
6.1.5.2. For sizes not listed in annex 5 the outer diameter of a tyre must not be outside 
  the values Dmin and Dmax obtained from the following formulae: 
Dmin = d + (2H x a) 
Dmax = d + (2H x b) 
  where:  H and d are as defined in paragraph 6.1.2.1. and a and b are as specified in 
paragraphs 6.1.5.2.1. and 6.1.5.2.2. respectively.  
                                                              
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6.1.5.2.1. For normal highway service tyres and snow tyres  a  
  Rim diameter code 13 and above    0.97   Rim diameter codes up to 12 inclusive   0.93   For special service tyres     1.00 6.1.5.2.2. For normal highway service tyres    b
 
  Rim diameter code 13 and above     1.07   Rim diameter codes up to 12 inclusive    1.10   For snow tyres and special  service tyres    1.12 
6.2.  Load/speed performance test 6.2.1. The pneumatic tyre shall undergo a load/speed performance test carried out 
by the procedure described in annex 7 to this Regulation. 
6.2.1.1. Where application is made for tyres identified by means of letter code "V" 
within the size designation and suitable for speeds over 240 km/h or for tyres identified by means of letter code "Z" within the size designation and suitable for speeds over 270 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 within 
parenthesis on the tyre (see paragraph 3.1.12.). Another load/speed test must be carried out on a second tyre of th e same type at the load and speed 
conditions, if any, specified as maximum by the tyre manufacturer (see paragraph 4.1.15.). 
6.2.2. A tyre which after undergoing the load/speed test does not exhibit any tread 
separation, ply separation, cord separation, chunking or broken cords shall be deemed to have passed the test. 
6.2.3. The outer diameter of the tyre, measured at least 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. 
6.2.4. The overall width of the tyre measured at the end of the load/speed 
performance test must not exceed the value determined in paragraph 6.1.4.2. 
6.3.  Dynamic growth of tyres  The tyres indicated in paragraph 1.1. of annex 9 to this Regulation, which 
have passed the test for load/speed performance requirements in accordance 
with paragraph 6.2. above, shall be submitted to a dynamic growth test to be carried out in accordance with the proc edure described in the said annex. 
  7.  Modifications of the type of pneumatic tyre and 
  extension of approval 
7.1. Every modification of the type of pneumatic tyre shall be notified to the 
administrative department which approved the type of pneumatic tyre. The department may then either: 
7.1.1. Consider that the modifications made are unlikely to have an appreciable 
adverse effect and that in any case, the pneumatic tyre still complies with the requirements; or  
                                                              
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7.1.2. Require a further test report from the technical service responsible for 
conducting the tests. 
7.1.3. A modification of the tread pattern of a tyre is deemed as not necessitating a 
repetition of the test specified in paragraph 6.2. 
7.1.4. Extensions of approval for tyres suitable for speeds over 240 km/h for tyres 
identified by means of letter code "V" within the size designation (or 270 km/h for tyres identified by means of letter code "Z" within the size designation), aiming at certification for different maximum speeds and/or loads, are permitted provided that a new test report, related to the new maximum speed and load rating, is supplied by the technical service responsible for carrying out tests. 
 Such new load/speed capabilities must be specified in item 9. of annex 1. 7.2. 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. 
7.3. The competent authority granting the extension of approval shall assign a 
series number to each communication form drawn up for such an extension. 
  8.  Conformity of production 
 The conformity of production procedures shall comply with those set out in 
the Agreement, Appendix 2 (E/ECE/ 324-E/ECE/TRANS/505/Rev.2), with 
the following requirements: 
8.1. Tyres approved under this Regulation shall be so manufactured as to conform 
to the type approved, by meeting the requirements set forth in paragraph 6. above. 
8.2. The authority which has granted type approval may at any time verify the 
conformity control methods applied in each productio n facility. For each 
production facility the normal frequency of these verifications shall be once every two years. 
  9.  Penalties for non-conformity of production 
9.1. The approval granted in respect of a type of pneumatic tyre pursuant to this 
Regulation may be withdrawn if the requirements laid down in paragraph 8.1. above are not complied with or if the tyres taken from the series have failed to pass the tests prescribed in that paragraph. 
9.2. If a Party to the Agreement applying  this Regulation withdraws an approval it 
has previously granted, it shall forthwith so notify the other Contracting Parties applying this Regulation by means of a communication form conforming to the model in annex 1 to this Regulation. 
  10.  Production de finitely discontinued 
 If the holder of an approval complete ly ceases to manufacture a type of 
pneumatic tyre approved in accordance with this Regulation, he shall so 
inform the authority which granted the approval. Upon receiving the relevant  
                                                              
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communication that authority shall inform thereof the other Parties to the 
1958 Agreement applying this Regul ation by means of a communication 
form conforming to the model in annex 1 to this Regulation. 
  11.  Names and addresses of technical services   
  responsible for approval tests, and of administrative   departments 
11.1. The Parties to the Agreement which apply this Regulation shall communicate 
to the United Nations Secretariat the names and addresses of the technical 
services responsible for approval tests and of the administrative departments which grant approval and to which forms certifying approval, or extension, or refusal or withdrawal of approval, issued in other countries, are to be sent. 
11.2. The Parties to the Agreement which apply this Regulation may use 
laboratories of tyre manufacturers and may designate, as approved, test laboratories among those which are situated on their territory or on the territory of another Party to the Ag reement, subject to a preliminary 
agreement to the procedure by the comp etent administrative department of 
the latter. 
11.3. Where a Party to the Agreement applies paragraph 11.2. above, it may, if it 
so desires, be represented at the tests by one or more persons of its choice.  
                                                              
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Appendix 
 
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Appendix 
  Explanatory figure 
(See paragraph 2 of the Regulation) 
 
 
 
 
 
   
                                                               
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Annex 1 
18 มอก. 2720–2558 
Annex 1 
  Communication 
(maximum format: A4 (210 x 297 mm)) 
  
 
 
concerning:2  APPROVAL GRANTED 
   APPROVAL EXTENDED    APPROVAL REFUSED    APPROVAL WITHDRAWN    PRODUCTION DEFINITELY DISCONTINUED 
of a type of pneumatic tyre for motor cycles and mopeds pursuant to Regulation No. 75 
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 de scription: ..............................................................................................  
5.1. Tyre size designation ....................................................................................................   
5.2. Category of use: ordinary/snow/special/moped
2 ...........................................................  
5.3. Structure: Diagonal/bias-belted/radial2 .........................................................................  
5.4. Speed category symbol  ................................................................................................  5.5. Load-cap acity i ndex ......................................................................................................   
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 issu ed by that service .......................................................................  
 
 
 1 Distinguishing number of the country which ha s granted/extended/refu sed/withdrawn approval 
(see approval provisions in the Regulation). 
 2 Strike out what does not apply. 
issued by:  Name of administration: 
...................................... ...................................... 
...................................... 
1 
                                                              
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Annexe 1 
 
 19 มอก. 2720–2558 
9. Reason(s) of extens ion (if app licable) ...........................................................................  
10. Any remarks ............................................................................................................... ...  
11. Pl ace ..................................................................................................................... .........  
12. Date ...................................................................................................................... .........  
13. Signature ................................................................................................................. ......  
14. Annexed to this communication is a list of documents in the approval  file deposited 
 at the Administrative Services having delivered the approval and which can be 
 obtained upon request. 
  
                                                              
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Annex 2 
 
20 มอก. 2720–2558 
Annex 2 
  Arrangement of the approval mark 
 
 
        a = 9 mm (min.)  The above approval mark affixed to a pneu matic tyre shows that the type of tyre 
concerned for motor cycles and mopeds has been approved in the Netherlands (E4) 
pursuant to Regulation No. 75 under approval number 002439. The first two digits of the approval number indicate that the approva l was granted in accordance with the 
requirements of Regulation No. 75 in its original form. 
Note : The approval number must be  placed close to the circle and either above or below 
the "E" or to the 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. 
 
75 R  - 002439   
                                                              
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Annex 3 
 
21 มอก. 2720–2558 
Annex 3 
  Arrangement of tyre markings 
  Example of the markings to be bo rne by types of tyres placed on the 
market after the entry into  force of this Regulation 
              
b 100/80  B 18  53 S  b b TUBELESS M + Sb 
             
            
 b  2503  b b = 4 mm min. 
These markings define a pneumatic tyre: 
• Having a nominal section width of 100; 
• Having a nominal aspect ratio of 80; 
• Having a bias-belted structure; 
• Having a nominal rim diameter of 457 mm, for which the code is l8; 
• Having a load capacity of 206 kg, corresponding to load index 53 in 
 Annex 4 to this Regulation; 
• Of speed category S (max imum speed 180 km/h); 
• For fitting without an inner tube ("tubeless"); 
• Snow tyre manufactured in the twen ty-fifth week of  the year 2003. 
The positioning and order of the markings constituting the tyre designation shall be the 
following: 
(a) The size designation, comprising the nomin al section width, the nominal aspect 
ratio, the type-of-structure symbol (where applicable) and the nominal rim diameter 
shall be grouped as shown in the above example: 100/80Bl8; 
(b) The load index and the speed-category sym bol shall be placed together near the size 
designation. They may either follow it or be placed above or below it; 
(c) The markings "TUBELESS" and "REINFORCED" or "REINF" and "M + S" and 
"MST" and/or "MOPED" (or CYCLOMOTEUR or CICLOMOTORE) may be at a distance from the size designation symbol. 
(d) In case of tyres suitable for speeds abov e 240 km/h the letter code "V" or "Z" as 
applicable, must be marked in front of the marking of structure  (e.g. 140/60ZR18). The reference load ca pacity index and speed category symbol 
must be marked within parenthesis as applicable  (see paragraph 3.1.12.).  
                                                              
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Annex 4 
 
22 มอก. 2720–2558 
Annex 4 
  Load capacity index/maximum mass correspondence 
A = Load capacity index 
B = Maximum corresponding mass (kg) 
A B A B 
16 71 47 175 
17 73 48 180 
18 75 49 185 
19 77.5 50 190 
20 80 51 195 
21 82.5 52 200 
22 85 53 206 
23 87.5 54 212 
24 90 55 218 
25 92.5 56 224 
26 95 57 230 
27 97 58 236 
28 100 59 243 
29 103 60 250 
30 106 61 257 
31 109 62 265 
32 112 63 272 
33 115 64 280 
34 118 65 290 
35 121 66 300 
36 125 67 307 
37 128 68 315 
38 132 69 325 
39 136 70 335 
40 140 71 345 
41 145 72 355 
42 150 73 365 
43 155 74 375 
44 160 75 387 
45 165 76 400 
46 170 77 412 
 
  
                                                              
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Annexe 4 
 
 23 มอก. 2720–2558 
A B 
78 425 
79 437 
80 450 
81 462 
82 475 
83 487 
84 500 
85 515 
86 530 
87 545 
88 560 
89 580 
90 600 
  
                                                              
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Annex 5 
 
24 มอก. 2720–2558 
Annex 5 
  Tyre size designation and dimensions 
Table 1 
Tyres for motor cycles 
Sizes with rim diameter code 12 and below 
Tyre size Measuring rim
width (code) Overall diameter (mm)) Section width 
(mm) Largeur hors tout 
maximale (mm) 
  D.min D D.max   
2.50 -  8  328 338 352   
2.50 -  9  354 364 378   
2.50 - 10 1.50 379 389 403 65 70 
2.50 - 12  430 440 451   
2.75 -   8  338 348 363   
2.75 -   9 1.75 364 374 383 71 77 
2.75 - 10  389 399 408   
2.75 - 12  440 450 462   
3.00 -   4  241 251 264   
3.00 -   5  266 276 291   
3.00 -   6  291 301 314   
3.00 -   7  317 327 342   
3.00 -   8 2.10 352 362 378 80 86 
3.00 -   9  378 388 401   
3.00 - 10  403 413 422   
3.00 - 12  454 464 473   
3.25 -   8  362 372 386   
3.25 -   9  388 398 412   
3.25 - 10 2.50 414 424 441 88 95 
3.25 - 12  465 475 492   
3.50 -   4  264 274 291   
3.50 -   5  289 299 316   
3.50 -   6  314 324 341   
3.50 -   7 2.50 340 350 367 92 99 
3.50 -   8  376 386 397   
3.50 -   9  402 412 430   
3.50 - 10  427 437 448   
3.50 - 12  478 488 506   
  
                                                              
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Annex 5 
 
25 มอก. 2720–2558 
Tyre size Measuring rim 
width (Code) Overall diameter
(mm) Section width 
(mm) Maximum overall width 
(mm) 
  D.min D D.max   
4.00 -   5  314 326 346   
4.00 -   6  339 351 368   
4.00 -   7 2.50 365 377 394 105 113 
4.00 -   8  401 415 427   
4.00 - 10  452 466 478   
4.00 - 12  505 517 538   
4.50 -   6  364  376 398   
4.50 -   7  390 402 424   
4.50 -   8  430 442 464   
4.50 -   9 3.00 456 468 490 120 130 
4.50 - 10  481 493 515   
4.50 - 12  532 544 568   
5.00 -   8  453 465 481   
5.00 - 10 3.50 504 516 532 134 145 
5.00 - 12  555 567 583   
6.00 -   6 4.00 424  436 464   
6.00 -   7  450 462 490 154 166 
6.00 -   8  494 506 534   
6.00 -   9  520 532 562   
Table 1a 
Tyres for mopeds 
Sizes with rim diameter code 12 and below 
Tyre size Measuring rim 
width (Code) Overall diameter
(mm) Section width 
(mm) Maximum overall width 
(mm)1 
  D.min D D.max1   
2 - 12 1.35 413  417 426 55 59 
2-1/2 - 12 1.50 425  431 441 62 67 
2-1/2 -  8 1.75 339 345 356 70 76 
2-1/2 -  9 1.75 365 371 382 70 76 
2-3/4 -  9 1.75 375 381 393 73 79 
3 - 10 2.10 412 418 431 84 91 
3 - 12 2.10 463 469 482 84 91 
1 Normal road (highway) service.  
                                                              
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Annexe 5 
 
26  มอก. 2720–2558 
Table 2 
Tyres for motor cycles 
Normal section size 
Tyre size Measuring rim 
width Code Overall diameter 
(mm) Section width   
(mm) Maximum overall width  
(mm) 
  D.min D D.max1 D.max2  1 2 
1 3/4 - 19 1.20 582  589 597 605 50 54 58 
2 - 14  461 468 477 484    
2 - 15  486 493 501 509    
2 - 16  511 518 526 534    
2 - 17  537 544 552 560    
2 - 18 1.35 562 569 577 585 55 58 63 
2 - 19  588 595 603 611    
2 - 20  613 620 628 636    
2 - 21  638 645 653 661    
2 - 22  663 670 680 686    
2 1/4 - 14  474  482 492 500    
2 1/4 - 15  499 507 517 525    
2 1/4 - 16  524 532 540 550    
2 1/4 - 17  550 558 566 576    
2 1/4 - 18 1.50 575 583 591 601 62 66 71 
2 1/4 - 19  601 609 617 627    
2 1/4 - 20  626 634 642 652    
2 1/4 - 21  651 659 667 677    
2 1/4 - 22  677 685 695 703    
2 1/2 - 14  489  498 508 520    
2 1/2 - 15  514 523 533 545    
2 1/2 - 16  539 548 558 570    
2 1/2 - 17  565 574 584 596    
2 1/2 - 18 1.60 590 599 609 621 68 72 78 
2 1/2 - 19  616 625 635 647    
2 1/2 - 20  641 650 660 672    
2 1/2- 21  666 675 685 697    
2 1/2 - 22  692 701 711 723    
  
                                                              
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Annex 5 
 
27 มอก. 2720–2558 
 
Tyre size Measuring rim 
width Code Overall diameter 
(mm) Section width   
(mm) Section width  
(mm) 
  D.min D D.max1 D.max2  1 2 
2 3/4 - 14  499  508 518 530    
2 3/4 - 15  524 533 545 555    
2 3/4 - 16  549 558 568 580    
2 3/4 - 17  575 584 594 606    
2 3/4 - 18 1.85 600 609 621 631 75 80 86 
2 3/4 - 19  626 635 645 657    
2 3/4 - 20  651 660 670 682    
2 3/4 - 21  676 685 695 707    
2 3/4 - 22  702 711 721 733    
3 - 16  560  570 582 594    
3 - 17  586 596 608 620    
3 - 18 1.85 611 621 633 645 81 86 93 
3 - 19  637 647 659 671    
3 1/4 - 16  575  586 598 614    
3 1/4 - 17  601 612 624 640    
3 1/4 - 18 2.15 626 637 651 665 89 94 102 
3 1/4 - 19  652 663 675 691    
1 Normal highway service. 
2 Special service and snow tyres.  
                                                              
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Annexe 5 
 
28  มอก. 2720–2558 
Table 3 
Tyres for motor cycles 
Normal section sizes 
Tyre size 
Measuring rim 
width Code Overall diameter 
(mm) Section 
width  
(mm) Section width  
(mm) 
  D.min D D.max1 D.max2  3 4 5 
2.00 - 14  460  466 478      
2.00 - 15  485 491 503      
2.00 - 16  510 516 528      
2.00 - 17 1.20 536 542 554  52 57 60 65 
2.00 - 18  561 567 579      
2.00 - 19  587 593 605      
2.25 - 14  474  480 492 496     
2.25 - 15  499 505 517 521     
2.25 - 16  524 530 542 546     
2.25 - 17 1.60 550 556 568 572 61 67 70 75 
2.25 - 18  575 581 593 597     
2.25 - 19  601 607 619 623     
2.50 - 14  486  492 506 508     
2.50 - 15  511 517 531 533     
2.50 - 16  536 542 556 558     
2.50 - 17 1.60 562 568 582 584 65 72 75 79 
2.50 - 18  587 593 607 609     
2.50 - 19  613 619 633 635     
2.50 - 21  663 669 683 685     
2.75 - 14  505 512 524 530     
2.75 - 15  530 537 549 555     
2.75 - 16  555 562 574 580     
2.75 - 17 1.85 581 588 600 606 75 83 86 91 
2.75 - 18  606 613 625 631     
2.75 - 19  632 639 651 657     
2.75 - 21  682 689 701 707     
  
                                                              
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Annexe 5 
 
 29 มอก. 2720–2558 
Tyre size 
Measuring rim 
width Code Overall diameter 
(mm) Section 
width  
(mm) Section width  
(mm) 
  D.min D D.max1 D.max2  3 4 5 
3.00 - 14  519  526 540 546     
3.00 - 15  546 551 565 571      
3.00 - 16  569 576 590 596      
3.00 - 17 1.85 595 602 616 622  80 88 92 97 
3.00 - 18  618 627 641 647      
3.00 - 19  644 653 667 673      
3.00 - 21  694 703 717 723     
3.00 - 23  747  754 768 774     
3.25 - 14  531 538 552 560     
3.25 - 15  556 563 577 585     
3.25 - 16  581 588 602 610     
3.25 - 17 2.15 607 614 628 636 89 98 102 108 
3.25 - 18  630 639 653 661     
3.25 - 19  656 665 679 687     
3.25 - 21  708 715 729 737     
3.50 - 14  539  548 564 572     
3.50 - 15  564 573 589 597     
3.50 - 16  591 598 614 622     
3.50 - 17 2.15 617 624 640 648 93 102 107 113 
3.50 - 18  640 649 665 673     
3.50 - 19  666 675 691 699     
3.50 - 21  716 725 741 749     
3.75 - 16  601 610 626 634     
3.75 - 17  627 636 652 660     
3.75 - 18 2.15 652 661 677 685 99 109 114 121 
3.75 - 19  678 687 703 711     
4.00 - 16  611 620 638 646     
4.00 - 17  637 646 664 672     
4.00 - 18 2.50 662 671 689 697 108 119 124 130 
4.00 - 19 688 697 715 723  
  
                                                              
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Annexe 5 
 
30  มอก. 2720–2558 
Tyre size 
Measuring rim 
width Code Overall diameter 
(mm) Section 
width 
(mm) Section width   
(mm) 
  D.min D D.max1 D.max2  3 4 5 
4.25 - 16  623  632 650 660     
4.25 - 17  649 658 676 686      
4.25 - 18 2.50 674 683 701 711  112 123 129 137 
4.25 - 19  700 709 727 737      
4.50 - 16  631 640 658 668      
4.50 - 17  657 666 684 694      
4.50 - 18 2.75 684 691 709 719 123 135 141 142 
4.50 - 19  707  717 734 745     
5.00 - 16  657 666 686 698     
5.00 - 17  683 692 710 724     
5.00 - 18 3.00 708 717 735 749 129 142 148 157 
5.00 - 19  734 743 761 775     
1 Tyres for normal highway service. 
2 Tyres for special service and snow tyres. 
3 Tyres for normal highway service up to speed category P inclusive. 
4 Tyres for normal highway service above  speed category P and snow tyres. 
5 Tyres for special service.  
                                                              
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Annexe 5 
 
 31 มอก. 2720–2558 
Table 4 
Tyres for motor cycles 
Low section sizes 
Tyre size 
Measuring rim 
width Code Overall diameter 
(mm) Section 
width  
(mm) Section width  
(mm) 
  D.min D D.max1 D.max2  3 4 5 
3.60 - 18  605  615 628 633     
 2.15     93 102 108 113 
3.60 - 19  631 641 653 658      
4.10 - 18  629 641 654 663      
 2.50     108 119 124 130 
4.10 - 19  655 667 679 688     
5.10 - 16  615 625 643 651     
5.10 - 17 3.00 641 651 670 677 129 142 150 157 
5.10 - 18  666 676 694 702     
4.25/85 - 18 2.50 649 659 673 683 112 123 129 137 
4.60 - 16  594 604 619 628     
4.60 - 17 2.75 619 630 642 654 117 129 136 142 
4.60 - 18  644 654 670 678     
6.10 - 16 4.00 646  658 678 688 168 185 195 203 
1 Tyres for normal highway service. 
2 Tyres for special service and snow tyres. 
3 Tyres for normal highway service up to speed category P inclusive. 
4 Tyres for normal highway service above  speed category P and snow tyres. 
5 Tyres for special service. 
 
  
                                                              
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32 มอก. 2720–2558 
Table 5 
Tyres for motor cycle derivatives1 
Tyre size Measuring rim
width Code Overall diameter 
(mm) Section width   
(mm) Section width  
(mm) 
  D.min D D.max   
3.00 -  8C   359 369 379   
3.00 -10C  2.10 410 420 430 80 86 
3.00 -12C   459 471 479   
3.50 -   8C   376 386 401   
3.50 - 10C  2.50 427 437 452 92 99 
3.50 - 12C   478 488 503   
4.00 -   8C   405 415 427   
4.00 - 10C  3.00 456 466 478 108 117 
4.00 - 12C  507 517 529   
4.50 -   8C  429 439 453   
4.50 - 10C 3.50 480 490 504 125 135 
4.50 - 12C  531 541 555   
5.00 -   8C  455 465 481   
5.00 - 10C 3.50 506 516 532 134 145 
5.00 - 12C  555 567 581   
Table 6 
Motor cycle tyres 
Low pressure sizes 
Tyre size Measuring rim
width Code Overall diameter 
(mm) Section width   
(mm) Section width  
(mm) 
  D.min D D.max   
5.4 - 10   474 481 487   
5.4 - 12   525 532 547   
5.4 - 14  4.00 575 582 598 135 143 
5.4 - 16  626 633 649   
6.7 - 10  532 541 561   
6.7 - 12 5.00 583 592 612 170 180 
6.7 - 14  633 642 662   
1 From the date of entry into fo rce of Supplement 8 to this Regul ation no new approvals for these 
tyres should be issued pursuant to Regulation No. 75. These tyre sizes are now included in 
Regulation No. 54, Annex 5, Part I, Table A.  
                                                              
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Annexe 5 
 
 33 มอก. 2720–2558 
Table 7 
Motor cycle tyres 
Sizes and dimensions of American tyres 
Tyre size Measuring rim
width Code Overall diameter 
(mm) Section width   
(mm) Section width  
(mm) 
  D.min D D.max   
MH90  - 21 1.85 682  686 700 80 89 
MJ90 -  18 2.15 620 625 640   
      89 99 
MJ90 - 19 2.15 645 650 665   
ML90 - 18 2.15 629 634 650   
      93 103 
ML90 - 19 2.15 654 659 675   
MM90 - 19 2.15 663 669 685 95 106 
MN90 - 18 2.15 656 662 681 104 116 
MP90 - 18 2.15 667 673 692 108 120 
MR90 - 18 2.15 680 687 708 114 127 
MS90 - 17 2.50 660 667 688 121 134 
MT90 - 16 3.00 642 650 672   
      130 144 
MT90 - 17 3.00 668 675 697   
MU90 - 15M/C 3.50 634 642 665   
      142 158 
MU90 - 16 3.50 659 667 690   
MV90 - 15M/C 3.50 643 651 675 150 172 
MP85 - 18 2.15 654 660 679 108 120 
MR85 - 16 2.15 617 623 643 114 127 
MS85 - 18 2.50 675 682 702 121 134 
MT85 - 18 3.00 681 688 709 130 144 
MU85 16M/C 3.50 650 658 681 142 158 
MV85 - 15M/C 3.50 627 635 658 150 172 
  
                                                              
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34 มอก. 2720–2558 
Annex 6 
  Method of measuring pneumatic tyres 
1.  The tyre is mounted on the measuring rim specified by the manufacturer 
 pursuant to paragraph 4.1.12. of this Regulation and is inflated to a pressure  specified by the manufacturer. 
  As an alternative, inflation pressures could be specified as follows: 
Tyre version Speed category Pressure 
  bar kPa 
Standard F, G, J, K, L, M, N, P, Q, R,S 2.25 225 
T, U, H, V, W 2.80  280 
Reinforced F à P   
 Q, R, S, T, U, H, V 3.30 330 
Motorcycle 
Derivatives1 4PR 
F à M 3.50 350 
 6PR 4.00 400 
 8PR 4.50 450 
Moped Standard 
Reinforced B 
B 2.25 
2.80 225 
280 
1 From the date of entry into fo rce of Supplement 8 to this Regul ation no new approvals for these 
tyres should be issued pursuant to Regulation No . 75. These tyre sizes are now included in 
Regulation No. 54. 
  For other tyre versions, inflate to the pressure specified by the tyre  
  manufacturer. 
2.  The tyre fitted on its rim is conditioned to the ambient temperature of the 
 laboratory for at least 24 hours.  
3.  The pressure is readjusted to th e value specified in paragraph 1 above. 
4.  The overall width is measured by  calliper at six equally-spaced points, 
 account being taken of the thickness of  the protective ribs or bands. The 
 highest measurement so obtained is taken as the overall width. 
5.  The outer diameter is determined by measuring the maximum circumference 
 and dividing the figure so obtained by π (3.1416).  
                                                              
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Annexe 7 
 
35 มอก. 2720–2558 
Annex 7 
  Procedure for load/speed performance tests 
  1.  Preparation of 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 the tyre to the appropriate pressure given in the following table: 
Testing inflation pressure (bars) 
Tyre size Speed Category  Inflation pressure 
bar kPa 
Standard F, G, J, K 2.50  250 
L, M, N, P 2.50 250 
Q, R, S 3.00 300 
T, U, H, V 3.50 350 
Reinforced F, G, J, K, L, M, N, P 3.30 330 
Q, R, S, T, U, H, V 3.90 390 
Motor cycle 
Derivatives1 4PR 
F, G, J, K, L, M 3.70 370 
6PR 4.50 450 
8PR 5.20 520 
Moped Standard B 2.50 250 
 Reinforced  B 3.00 300 
1 From the date of entry into fo rce of Supplement 8 to this Regul ation no new approvals for these 
tyres should be issued pursuant to Regulation No. 75. These tyre sizes are now included in 
Regulation No. 54. 
  For speeds above 240 km/h, the test pressure is 3.20 bar (320 kPa). 
  For other types of tyre, inflate to th e pressure specified by the manufacturer. 
1.3.  The manufacturer may request, giving reasons, the use of test-inflation 
 pressures differing from those given under paragraph 1.2. above. In such a  case the tyre shall be inflated to that pressure. 
1.4.  Condition the tyre-and-wheel assembly at test room temperature for not less 
 than three hours. 
1.5.  Readjust the tyre pressure to that sp ecified in paragraphs 1.2. or 1.3. above.  
                                                              
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  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 test drum of 1.70 m ±1 per cent or 2.0 m ±1 per cent in 
diameter. 
2.2. Apply to the test axle a load equal to 65 per cent of: 2.2.1. The maximum load rating equated to the Load Capacity Index for tyres with 
speed symbols up to H inclusive; 
2.2.2. The maximum load rating associated  with a maximum speed of 240 km/h for 
tyres with speed symbol "V" (see paragraph 2.33.3. of this Regulation); 
2.2.3. The maximum load rating associated  with a maximum speed of 270 km/h for 
tyres with speed symbol "W" (see paragraph 2.33.3.); 
2.2.4. The maximum load rating associated  with the maximum speed specified by 
the tyre manufacturer for tyres suitable for speeds above 240 km/h (or 270 km/h as applicable) (see paragraph 6.2.1.1.). 
2.2.5. In case of moped tyres (speed category symbol B) the test load is 65 per cent 
on a 1.7 m diameter test drum and 67 per cent on a 2.0 m diameter test drum. 
2.3. The tyre pressure must not be corrected throughout the test and the test load 
must be kept constant. 
2.4. During the test the temperature in the test room must be maintained between 
20°C and 30 C or at a higher temperature if the manufacturer so agrees. 
2.5. The test shall be ru n without interruptio n, in accordance w ith the following: 
2.5.1. Twenty minutes is allowed to build up from zero to the initial test speed; 2.5.2. Initial tests speed: 30 km/h less than the speed corresponding to the speed 
category symbol marked on the tyre  (see paragraph 2.28.2. of this 
Regulation) if a 2.0 m diameter test drum is used, or 40 km/h less if a 1.7. m diameter test drum is used; 
2.5.2.1. The maximum speed to be consider ed for the second test in case of tyres 
suitable for speeds above 240 km/h for tyres identified by means of letter code "V" within the size designation (or 270 km/h for tyres identified by means of letter code "Z" within the size designation) is the maximum speed specified by the tyre manufacturer (see paragraph 4.1.15.). 
2.5.3. Speed steps of 10 km/h; 2.5.4. Test duration at each  speed step: 10 minutes; 
2.5.5. Total duration of the test: 1 hour; 2.5.6. Maximum test speed: the maximum rated speed of the type of tyre if the test 
is performed with a 2.0 m diameter test drum; maximum rated speed for the type of tyre less 10 km/h if the test is performed with a 1.7 m diameter test drum. 
2.5.7. In case of moped tyres (speed category symbol B), the test speed is 50 km/h, 
the build-up from 0 to 50 km/h is 10 minutes, the duration at the speed step is 30 minutes with a total duration of the test of 40 minutes.   
                                                              
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2.6. However, in case a second test is performed to assess the top performances of 
tyres suitable for speed above 240 km/h, the procedure shall be the following: 
2.6.1. Twenty minutes to build up from zero to the initial test speed; 2.6.2. Twenty minutes at the initial test speed; 2.6.3. Ten minutes to build up to the maximum test speed; 2.6.4. Five minutes at the maximum test speed. 
  3.  Equivalent tests 
 If a test other than that described above is used, its equivalence must be 
proved.  
                                                              
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Annex 8 
  Tyre load capacities at various speeds 
Speed  
(km/h) Variation in load carrying capacity  (%) 
Moped Rim Diameter Code up to 12 inclusive Rim Diameter Code
13 and above  
Speed Symbol Speed Symbol 
B J K L J K L M N P and 
above 
 
30 +30  +30  +30 
50 0 +30 +30 
60  +23 See column J 
 +23 See column J 
70  +16   +16   
80  +10 +10 +14  
90  +5 +7,5  +5 +7,5  +7,5 +7,5 +12 
100  0 0  +5 0 0  +5,0 +5 +5 +10 
110  -7 0 +2,5  0 +2,5 +2,5 +2,5 +8 
120  -15 -6 0   0 0 0 +6 
130  -25 -12 -5    0 0 +4 
140         0  
  
                                                              
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Annex 9 
  Test procedure for the dynamic growth of tyres 
1.  Scope and range of application 
1.1. This testing procedure is applicable for tyres mentioned in paragraph 3.4.1. 
and 4.1. below. 
1.2. It serves to determine the maximum tyre growth under the influence of 
centrifugal forces at the admissible maximum speed. 
2.  Description of test procedure 2.1. The test axle and the rim must be controlled in order to assure a radial run-out 
less than ±0.5 mm and a lateral run-out less than ±0.5 mm, when measured at the bead seat of the wheel. 
2.2. Contour outline device  Any device (projecting grid, camera, spot lights and others) which permits 
the external contour of the tyre cross-section to be outlined distinctly, or to establish an enveloping curve, normal to the tyre equator, at the point of the maximum deformation of the tread. 
 The device should reduce to a minimum any distortion and assure a constant 
(known) ratio (K) between the plotted contour and the actual tyre dimensions. 
 The device shall permit reference of the tyre contour to the wheel axis. 2.3. The deviation of the tyre tread peripheral speed, measured with a 
stroboscope, from the corresponding maximum speed of the tyre may not exceed ±2 per cent. 
2.4. If another test procedure is applied, it must be proved to be equivalent to the 
present procedure. 
3.  Execution of test 3.1. During the test, the temperature in the test room must be maintained at 
between 20 °C and 30 °C or at a high er temperature if the tyre manufacturer 
agrees. 
3.2. The tyres to be tested shall have passed the load speed performance test 
according to annex 7 of the Regula tion, without showing any defect. 
3.3. The tyre to be tested shall be fitted to a wheel having a rim conforming to the 
applicable standard. 
3.4. The tyre inflation pressure (testing pr essure) shall be adjusted to the values 
indicated in paragraph 3.4.1. below.  
                                                              
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3.4.1. Road tyres in bias and bias/belted construction. 
Speed category Tyre construction Testing pressure 
  bar kPA 
P/Q/R/S standard 2,5 250 
T and above standard 2,9 290 
3.5. The tyre/wheel assembly shall be stored at the temperature of the testing 
room for a period of at least three hours. 
3.6. After this conditioning storage period the inflation pressure shall be 
readjusted to the value indicated in paragraph 3.4. 
3.7. Mount the tyre and rim assembly on the test axle and ensure the assembly is 
freely rotating. The tyre can be rotate d either by means of a drive motor 
acting on the tyre axis or by pressing it against a test drum. 
3.8. Accelerate the assembly without interr uption to reach within five minutes the 
maximum speed capability of the tyre. 
3.9. Position the contour outline device and ascertain that it is perpendicular to the 
rotation of the test tyre tread. 
3.10. Check that the peripheral speed of th e tread surface is within ±2 per cent of 
the maximum speed capability for the tyre. Maintain the equipment at constant speed for at least five minutes and then portray the tyre cross-section 
in the area of maximum deformation, or  check that the tyre does not exceed 
the enveloping curve.  
                                                              
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  4.  Evaluation 
4.1. The limiting curve (enveloping curve) specified for the mounted tyre/wheel 
assembly shall be as in the example below). 
 
Enveloping curve for cen trifugal growth test 
SG = Maximum overall width in service 
 (This changes 1 mm per 0.1 Rim width code change  from the measuring rim) 
H
dyn = Centrifugal radius – D/2.   
                                                              
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In accordance with paragraphs 6.1.4. and 6. 1.5. of the Regulation, the following limit 
values have been established for the enveloping curve: 
Speed Category  H dyn (mm) 
 Category of Use: 
Normal  Category of Use: Snow and special
 
P/Q/R/S H x 1,10 H x 1,15 
T/U/H H x 1,13 H x 1,18 
Over 210 km/h H x 1,16 - 
4.1.1. The main dimensions of the enveloping curve must be adjusted, if applicable, 
taking into account the constant ratio K (see paragraph 2.2. above). 
4.2. The contour of the ty re portrayed at the maximu m speed shall not exceed the 
enveloping curve, with reference to the tyre axes. 
4.3. The tyre is not subjected to a further test. 
     
                                                              
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