GB/T 2978-2008 English PDF (GBT2978-2008)

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GB/T 2978-2008: Size designation, dimensions, inflation pressure and load capacity for passenger car tyres
GB/T 2978-2008 (replaced by GB/T 2978-2014, from Sep 2015)
GB
National Standard
of the People’s Republic of China
ICS 83.160.10
G 41
Replacing GB/T 2978-1997
Size Designation, Dimensions, Inflation Pressure and Load
Capacity for Passenger Car Tyres
(Replaced by GB/T 2978-2014, from Sep 2015)
ISSUED ON. JUNE 4, 2008
IMPLEMENTED ON. DECEMBER 1, 2008
Jointly issued by. General Administration of Quality Supervision, Inspection
and Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic
of China.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative References ... 5 
3 Terms and Definitions ... 5 
4 Size Designation Method ... 5 
5 Size Designation, Dimensions, Inflation Pressure and Load of Tyres ... 6 
6 Inflating Valves ... 7 
Appendix A ... 50 
Appendix B ... 51 
Table 1 Radial Tyres for Passenger Cars - Series 80 ... 8 
Table 2 Radial Tyres for Passenger Cars - Series 75 ... 11 
Table 3 Radial Tyres for Passenger Cars - Series 70 ... 13 
Table 4 Radial Tyres for Passenger Cars - Series 65 ... 16 
Table 5 Radial Tyres for Passenger Cars - Series 60 ... 18 
Table 6 Radial Tyres for Passenger Cars - Series 55 ... 21 
Table 7 Radial Tyres for Passenger Cars - Series 50 ... 23 
Table 8 Radial Tyres for Passenger Cars - Series 45 ... 25 
Table 9 Radial Tyres for Passenger Cars - Series 40 ... 27 
Table 10 Radial Tyres for Passenger Cars - Series 35 ... 29 
Table 11 Radial Tyres for Passenger Cars - Series 30 ... 31 
Table 12 Radial Tyres for Passenger Cars - Series 25 ... 33 
Table 13 T-type Temporary-use Spare Tyre ... 34 
Table 14 Reserved Old Series of Radial Tyres for Passenger Cars a ... 35 
Table 15 Reserved Old Series of Diagonal Tyres for Passenger Cars a ... 37 
Table 16 Relations between Load and Inflation Pressure of Standard Radial Tyres for
Passenger Cars ... 39 
Table 17 Relations between Load and Inflation Pressure of Enhanced Radial Tyres for
Passenger Cars ... 43 
Table 18 Minimum Inflation Pressure Adjustment for Radial Tyres for Passenger Cars with
Speed over 160 km/h ... 47 
Table 19 Variation Percentage of Load Capacities of Passenger Car Tyres with Speed over 210
km/h ... 48 
Table 20 Model of Inflating Valve Used on Passenger Car Tyres ... 49 
Foreword 
This Standard is not equivalent to ETRTO-2007 “The European Tyre and Rim Technical
Organisation Standards Manual” (English Edition).
This Standard replaces GB/T 2978-1997 "Series of Passenger Car Tyres".
Compared with GB/T 2978-1997, this Standard has the main changes as follows.
— The expression "speed step " in GB/T 2978-1997 is changed to "speed symbol"
(Chapters 3, 4 and 5 of the 1997 edition; Chapters 4 and 5, Tables 1~19 and Appendix
B of this edition; )
— The expression "standard rim" is changed to ""measuring rim" (Tables 2~9 of the 1997
edition; Tables 1~15 of this edition);
— Radial tyre series 40, 35, 30, and 25 as well as Type T temporary-use spare tyre for
passenger cars are added in this Standard (Tables 9~13 of this edition);
— The inflation pressure table for enhanced radial tyres for passenger cars is added in this
Standard (Table 17 of this edition);
— The basic inflation pressures for enhanced tyres of each series are adjusted in this
Standard (Tables 2~9 of the 1997 edition; Tables 1~14 of this edition);
— Requirements for enhanced radial tyres for passenger cars and the designation "ZR" are
added in this Standard (Chapter 4 of this edition);
— The requirements for maximum pressure of use for radial tyres for passenger cars are
added in this Standard (5.6 of this edition);
— Recommendatory requirements for the use of inflating valves of radial tyres for
passenger cars are added in this Standard (Chapter 6 of this edition);
— Requirements for the corresponding relations between speeds and basic inflation
pressures of tyres with speed over 160 km/h under the maximum load are added in this
Standard (refer to Table 18);
— Requirements for the load variation for tyres with speed over 210 km/h are added in
this Standard (Table 19 of this edition); and
— Requirements for the deviation of section width and overall diameter of passenger car
tyres are adjusted in this Standard (Table 2 of the 1997 edition; Table 1 of this edition).
Appendixes A and B of this Standard are normative.
This Standard was proposed by China Petroleum and Chemical Industry Association.
This Standard shall be under the jurisdiction of National Technical Committee 19 on Tyres
and Rims of Standardization Administration of China (SAC/TC 19).
Drafting organizations of this Standard. Guangzhou Southern China Tire and Rubber Co. Ltd.,
Shandong Linglong Tire Co., Ltd, Triangle Group Co., Ltd., Hangzhou Zhongce Rubber Co.,
Ltd., Beijing Research and Design Institute of Rubber Industry, Shanghai Michelin Warrior
Tyre Co., Ltd., Giti Radial Tire Anhui Co., Ltd., Nanjing Kumho Tire Co., Ltd., Beijing
Capital Tyre Co., Ltd, and Sailun Co., Ltd.
Chief drafting staff of this Standard. Lu Kun, Chi Wen, Dong Maohua, Yi Shanhui, Chen
Guohua, Xu Lihong, Lu Yi, Xiao Song, Wang Zhengrong, Zhao Dongmei, and Liu Yansheng.
Historical editions replaced by this Standard are as follows.
— GB/T 2978-1982, GB/T 2978-1989, and GB/T 2978-1997.
Size Designation, Dimensions, Inflation Pressure
and Load Capacity for Passenger Car Tyres
1    Scope 
This Standard specifies the terms and definitions of passenger car tyres, the size designation
methods, and the dimensions, inflation pressures and loads corresponding to size designation
etc.
This Standard is applicable to new pneumatic tyres of passenger cars.
2    Normative References 
The following documents contain provisions which, through reference in this Standard,
constitute provisions of this Standard. For dated reference, subsequent amendments
(excluding corrections) or revisions of these publications do not apply. However, parties
coming to agreements based on this Standard are encouraged to investigate the possibility of
applying the most recent editions of the standards. For undated references, the latest edition of
the normative document referred to applies.
GB/T 6326 "Tyre Terms and Definitions" (GB/T 6326-2005, ISO 4223-1. 2002, NEQ)
3    Terms and Definitions 
For the purposes of this Standard, the terms and definitions established in GB/T 6326 apply.
4    Size Designation Method 
The tyres for passenger cars are defined and represented with their size designations and
directions for use.
Example 1.
measuring rim, new tyre dimensions, maximum dimensions in service, static loaded radius,
rolling radius and approved rims.
5.2 As for standard and enhanced radial tyre for passenger cars with speed of 160 km/h or
below, the corresponding relations between their load capacities and different inflation
pressures shall meet the requirements specified in Tables 16 and 17 respectively.
5.4 The corresponding relations between load indexes and load capacities shall meet the
requirements specified in Appendix A.
5.5 The corresponding relations between speed symbols and maximum speeds shall meet
the requirements specified in Appendix B.
5.6 The "inflation pressure" mentioned in this Standard refers only to the inflation pressure
of tyres under cold state at normal temperature, excluding the pressure in...