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This standard is developed in accordance with the rules given in GB/T 1.1-2009
This standard replaces GB/T 2977-2008 Size Designation, Dimensions, Inflation Pressure and Load Capacity for Truck Tyres; the following technical changes have been made with respect to GB/T 2977-2008 (the previous edition):
——The data of dimension, load capacity, inflation pressure, permitted rim and inflating valve model of partial tyre size designation are adjusted (see Table 2, Table 6, Tables 8~11, Table 20 and Table 26);
——Some size designations are added for tyres of partial types (see Table 4, Table 5, Tables 8~11, Table 17, Table 18, Table 22, Table 23, Table 2, Table 26 and Table 27);
——Ply rating is added for partial size designations (see Table 2, Table 4, Table 5, Tables 8~10, Table 17, Table 18, Table 22, Table 23, Table 25 and Table 27);
——The normal section radial tyre for Ultra Light Truck is added (see Table 3);
——The metric radial tyres for light truck (Series 80, 55, 50, 45, 40, 35 and 5° rim) are added (see Table 7 and Tables 12~16);
——The metric radial tyres for truck (Series 80~95, 5° rim) are added (See Table 24);
——The metric radial tyres for truck (Series 60, 15° rim) are added (See Table 29);
——The metric radial tyres for truck (Series 45~55, 15° rim) are added (See Table 30);
——The radial tyres for multi-purpose truck (Series 70~80, 5° rim) are added (See Table 31);
——The statement "see the remarks of Yearbook for Standard of Chinese Tyre Rim Inflating Valve for new size designations not covered hereby" is added (see Table 1, Table 3, Tables 17~19, Table 22, Table 21, Table 28 and Table 31);
——The service descriptions for rim and corresponding inflating valve used for light truck tubeless tyre are added (see Tables 1 and 3);
——The dual load and minimum dual spacing of special ST metric tyre for highway trailer are added (See Table 18);
——The requirements that the maximum overall diameter of new tyre with mud and snow pattern and new snow tyre as well as maximum tyre overall diameter in service may be increased by 1% are added (See Tables 19~ 33);
——The requirements of maximum/minimum peripheral dimension calculation and rounding off are added (see Annex D).
This standard was proposed by China Petroleum and Chemical Industry Federation.
This standard is under the jurisdiction of SAC/TC 19 National Technical Committee 19 on Tyres and Rims of Standardization Administration of China.
The previous editions of this standard are as follows:
——GB/T 2977-1982, GB/T 2977-1989, GB/T 2977-1997 and GB/T 2977-2008;
——GB/T 19047-2003.
Size Designation, Dimensions, Inflation Pressure and Load Capacity for Truck Tyres
1 Scope
This standard specifies size designation expression method, size designation, dimension, inflation pressure and load capacity for truck tyres.
This standard is applicable to new pneumatic tyres of truck.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 6326 Tyre Terms and Definitions
GB/T 8170 Rules of Rounding off for Numerical Values & Expression and Judgment of Limiting Values
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 6326 apply.
4 Size Designation Expression Method
4.1 Midget and light truck tyres
Example 1:
Tyre size designation service description
Example 2:
Tyre size designation service description
4.2 Truck tyres
Example 1:
Tyre size designation service description
Example 2:
Tyre size designation service description
5 Size Designation, Dimensions, Inflation Pressure and Load Capacity of Tyres
5.1 Tyre size designation, ply rating, load index, measuring rim, new tyre section width and overall diameter after inflation, load capacity, inflation pressure and permitted rim shall be in accordance with those specified in Tables 1~33; maximum tyre dimension in service, static loaded radius, minimum dual spacing and permitted rim should be in accordance with those specified in Tables 1~33; see Annex A for tyre size designation data marked according to foreign standards.
5.2 The corresponding relationship between tyre travelling speed and load change shall be in accordance with those specified in Table 34; when load is increased, inflation pressure shall be properly increased with the increase proportion determined through negotiation with the manufacturer.
5.3 The corresponding relationship between load index and load capacity shall comply with the requirements of Annex B.
5.4 The corresponding relationship between the speed symbol and the maximum travelling speed shall comply with the requirements of Annex C.
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Size Designation Expression Method
5 Size Designation, Dimensions, Inflation Pressure and Load Capacity of Tyres
Annex A (Informative) Size Designations Marked According to Foreign Standards
Annex B (Normative) Corresponding Relationship between Load Index and Load Capacity
Annex C (Normative) Corresponding Relationship between Speed Symbol and Maximum Travelling Speed
Annex D (Normative) Rules for Calculation and Rounding off of Maximum/Minimum Peripheral Dimension of New Tyre
Table 1 Normal Section Diagonal Tyre for Ultra Light Truck (5° Rim)
Table 2 Normal Section Diagonal Tyre for Light Truck (5° Rim)
Table 3 Normal Section Radial Tyre for Ultra Light Truck (5° Rim)
Table 4 Normal Section Radial Tyre for Light Truck (5° Rim)
Table 5 Metric Radial Tyre for Light Truck (Series 100 and 85; 5° Rim)
Table 6 Metric Radial Tyre for Light Truck (5° Rim)
Table 7 Metric Radial Tyre for Light Truck (Series 80; 5° Rim)
Table 8 Metric Radial Tyre for Light Truck (Series 75; 5° Rim)
Table 9 Metric Radial Tyre for Light Truck (Series 70; 5° Rim)
Table 10 Metric Radial Tyre for Light Truck (Series 65; 5° Rim)
Table 11 Metric Radial Tyre for Light Truck (Series 60; 5° Rim)
Table 12 Metric Radial Tyre for Light Truck (Series 55; 5° Rim)
Table 13 Metric Radial Tyre for Light Truck (Series 50; 5° Rim)
Table 14 Metric Radial Tyre for Light Truck (Series 45; 5° Rim)
Table 15 Metric Radial Tyre for Light Truck (Series 40; 5° Rim)
Table 16 Metric Radial Tyre for Light Truck (Series 35; 5° Rim)
Table 17 Floatation Radial Tyre for Light Truck
Table 18 Pecial ST Metric Tyre for Highway Trailer (5° Rim)
Table 19 Normal Section Diagonal Tyre for Truck (5° Rim)
Table 20 Normal Section Diagonal Tyre for Truck (15° Rim)
Table 21 Wide Base Diagonal Tyre for Truck (15° Rim)
Table 22 Normal Section Radial Tyre for Truck (5° Rim)
Table 23 Normal Section Radial Tyre for Truck (15° Rim)
Table 24 Metric Radial Tyre for Truck (Series 80~95; 5° Rim)
Table 25 Metric Radial Tyre for Truck (Series 80~90; 15° Rim)
Table 26 Metric Radial Tyre for Truck (Series 75; 15° Rim)
Table 27 Metric Radial Tyre for Truck (Series 70; 15° Rim)
Table 28 Metric Radial Tyre for Truck (Series 65; 15° Rim)
Table 29 Metric Radial Tyre for Truck (Series 60; 15° Rim)
Table 30 Metric Radial Tyre for Truck (Series 45~55; 15° Rim)
Table 31 Radial Tyre for Multi-purpose Truck (Series 70~80; 5° Rim)
Table 32 Motor Home Tyre (15° Rim)
Table 33 Tyres with Production Reserved
Table 34 Relationship between Tyre Travelling Speed and Load Change
Table A.1 Metric Radial Tyre for Light Truck of Type C (Series 55~95; 5° Rim)
Table A.2 Truck Tyres Mainly Used for Driven Wheel (FRT Tyre) (15° Rim)
Table A.3 Radial Tyre for Truck (15° Rim)
Table B.1 Corresponding Relationship between Load Index and Load Capacity
Table C.1 Corresponding Relationship between Speed Symbol and Maximum Travelling Speed
