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GB/T 2978-2014
GB
National Standard
of the People’s Republic of China
ICS 83.160.10
G 41
Replacing GB/T 2978-2008
Size designation, dimensions, inflation pressure and
load capacity for passenger car tyres
ISSUED ON. DECEMBER 05, 2014
IMPLEMENTED ON. JANUARY 01, 2015
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 ... 4
1 Scope ... 6
2 Normative references ... 6
3 Terms and Definitions ... 6
4 Size Designation Method ... 6
5 Size Designation, Dimensions, Inflation Pressure and Load of Tyres ... 8
6 Inflating Valves ... 9
Appendix A ... 59
Appendix B ... 60
Table 1 Radial Tyres for Passenger Cars - Series 80 ... 10
Table 2 Radial Tyres for Passenger Cars - Series 75 ... 13
Table 3 Radial Tyres for Passenger Cars - Series 70 ... 15
Table 4 Radial Tyres for Passenger Cars - Series 65 ... 18
Table 5 Radial Tyres for Passenger Cars - Series 60 ... 21
Table 6 Radial Tyres for Passenger Cars - Series 55 ... 24
Table 7 Radial Tyres for Passenger Cars - Series 50 ... 27
Table 8 Radial Tyres for Passenger Cars - Series 45 ... 30
Table 9 Radial Tyres for Passenger Cars - Series 40 ... 33
Table 10 Radial Tyres for Passenger Cars - Series 35 ... 36
Table 11 Radial Tyres for Passenger Cars - Series 30 ... 40
Table 12 Radial Tyres for Passenger Cars - Series 25 ... 43
Table 13 T-type Temporary-use Spare Tyre ... 45
Table 14 Reserved-Produced Old Series of Radial Tyres for Passenger Cars
a ... 47
Table 15 Reserved-Produced Old Series of Diagonal Tyres for Passenger
Cars a ... 48
Table 16 Relations between Load and Inflation Pressure of Standard Radial
Tyres for Passenger Cars ... 50
Table 17 Relations between Load and Inflation Pressure of Enhanced Radial
Tyres for Passenger Cars ... 53
Table 18 Minimum Inflation Pressure Adjustment for Radial Tyres for
Passenger Cars with Speed over 160 km/h ... 56
Table 19 Variation Percentage of Load Capacities of Passenger Car Tyres
with Speed over 210 km/h ... 57
Table 20 Model of Inflating Valve Used on Passenger Car Tyres ... 58
Foreword
This Standard was drafted according to the provisions given by GB/T 1.1-2009.
This Standard replaces GB/T 2978-2008 “Size designation, dimensions, inflation
pressure and load capacity for passenger car tyres”. Compared with GB/T 2978-1997,
this Standard has the main changes as follows.
— ADD the provisions for identification mark "ZR", and speed symbol of radial
tyres for passenger cars with speed of over 300 km/h (see Chapter 4);
— ADD the expressing methods of run-flat tires (see Chapter 4);
— ADJUST the maximum total width of new radial tyres for passenger cars (see
Table 1; Table 1 of 2008 edition);
— ADJUST the maximum total width of new tyres with rim protector lines (see
Table 1; Table 1 of 2008 edition);
— ADD the requirements for maximum outer diameter, and tyres maximum overall
diameter for use of new snow tyres (see Table 1);
— ADD the gas pressure requirement for peripheral measurement scale of car bias
tyres that are reserved-produced (see Table 1);
— ADJUST partial specifications standard load index (see Table 1 and Table 8;
Table 1 and Table 8 of 2008 edition);
— ADD the 70, 65, 60, 55, 50, 45, 40, 35, 30, 25 series of radial tyres for
passenger cars, and Type T temporary-use spare tyre for passenger cars (see
Table 3~13);
— ADJUST the requirements for the maximum total width and maximum outer
diameter of new Type T temporary-use spare tyre - radial tyres and bias tyres
(see Table 13; Table 13 of 2008 edition);
— ADJUST the inflation pressure for measurement scale of Type T temporary-use
spare tyre (Table 13; Table 13 of 2008 edition);
— DELETE partial radial tyres for passenger cars that are reserved-produced (see
Table 14; Table 14 of 2008 edition);
— DELETE partial bias tyres for passenger cars that are reserved-produced (see
Table 15; Table 15 of 2008 edition);
— ADJUST partial load capacity of enhanced radial car tire for passenger cars (see
Table 17; Table 17 of 2008 edition).
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. Triangle Group Co., Ltd., Guangzhou
Southern China Tire & Rubber Co. Ltd., Zhongce Rubber Group Co., Ltd., Shandong
Linglong Tire Co., Cheng Shin Rubber (Xiamen) Ind., Ltd., Sailun Group Co., Ltd.,
Aeolus Tyre Co., Ltd., Double Star Group Co., Ltd., Beijing Research & Design
Institute of Rubber Industry., Michelin (China) Investment Co., Ltd., Bridgestone
(China) Investment Co., Ltd., Goodyear Dalian Tire Co., Ltd., Toyo Tires
(Zhangjiagang) Co., Ltd., and Kumho Tire Co., Ltd.
Chief drafting staff of this Standard. Zhang Tao, Jiang Xiaohui, Qiu Xi’ning, He
Haoming, Chen Shaomei, Chen Jianming, Xiao Shenglong, Zhang Ai’ping, Qi
Shunqing, Wang Kexian, Lu Yi, Fu Guangping, Yin Qingping, Zhu Bangneng, Yang
Xiaochun, Xu Lihong, Mou Shouyong, and Xie Libo.
Historical editions replaced by this Standard are as follows.
— GB/T 2978-1982, GB/T 2978-1989, GB/T 2978-1997, and GB/T 2978-2008.
Size designation, dimensions, inflation pressure and
load capacity for passenger car tyres
1 Scope
This Standard specifies the passenger car tyres’ terms and definitions, size
designation methods; dimensions, inflation pressures, and loads that are
corresponding to size designation etc.
This Standard is applicable to new pneumatic tyres of passenger cars.
2 Normative references
The following documents are essential for the application of this document. For dated
references, only the dated editions apply to this document. For undated references,
the latest editions (including all corrections) of the referenced documents apply to this
document.
GB/T 6326 "Tyre Terms and Definitions"
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 passenger car tyres are defined and represented by size designation marks and
instructions for use.
6 Inflating Valves
The model of inflating valves should meet the requirements specified in Table 20; if
valves of other models are to be used, the user shall consult with the manufacturer.
Table 1 Radial Tyres for Passenger Cars - Series 80
Size designation
Load index
Measuring rim
New tyre
dimensions/mm
Maximum tyre
dimensions in
service/mm
Static loaded radius/mm
Rolling radius /mm
Load capacity
/kg
Inflation
pressure/kPa
Permitted rims
Standard
Enhanced
Section width
Outer
diameter
Overall width
Outer
diameter
Standard
Enhanced
Standard
Enhanced
115/80 R17 66 - 3J 113 616 118 624 288 299 300 - 240 - 3½J
125/80 R17 71 - 3½J 126 632 131 640 294 307 345 - 240 - 4J
135/80 R12 68 - 3.50B 133 521 138 529 237 253 315 - 240 - 4.00B, 4.50B
R13 70 74 3.50B 133 546 138 555 249 265 335 375 240 280 4.00B, 4.50B
R14 72 - 3½J 133 572 138 580 262 278 355 - 240 - 4J
R15 73 - 3½J 133 597 138 605 275 290 365 - 240 - 4J
145/80 R10 69 - 4.00B 145 486 151 496 217 236 325 - 240 - 3.50B, 4.50B
R12 74 - 4.00B 145 537 151 547 243 261 375 - 240 - 3.50B, 4.50B
R13 75 79 4.00B 145 562 151 572 255 273 387 437 240 280 3.50B, 4.50B
R14 76 - 4J 145 588 151 598 268 286 400 - 240 - 3½J, 4½J
R15 77 - 4J 145 613 151 623 281 298 412 - 240 - 3½J, 4½J
155/80 R10 73 77 4.50B 157 502 163 512 224 244 365 412 240 280 4.00B, 5.00B
R12 77 - 4.50B 157 553 163 563 249 259 412 - 240 - 4.00B, 5.00B
R13 79 83 4.50B 157 578 163 588 262 281 437 487 240 280 4.00B, 5.00B
R14 81 - 4½J 157 604 163 614 275 293 462 - 240 - 4J, 5J
The outer edge size deviations are as follow.
The maximum new tyre total width = the new tyre section width × 1.04; if rim protector line is designed, the overall width is not greater than
104 % + 8 mm of the new tyre section width;
The minimum new tyre total width = the new tyre section ...
......
(Above excerpt was released on 2015-05-25, modified on 2021-06-07, translated/reviewed by: Wayne Zheng et al.)
Source: https://www.chinesestandard.net/PDF.aspx/GBT2978-2014