This standard specifies test methods for verifying the capabilities of tyres for truck and bus, including terms and definitions, test equipment and precision, test conditions, test procedure, judgment criterion and test report, etc. Of the test methods presented, only some may be required depending on the type of tyre to be tested.
This standard includes:
(1) Endurance test — test the endurance capability of tyres by the travel distance under specified load and speed;
(2) High speed test — test the capability of the tyre according to its speed symbol;
(3) Strength test — test the capability of the tyre structure with respect to braking energy of tread cap.
The test methods presented in this standard are not intended for gradation of tyre capabilities or quality levels.
This standard is applicable to new pneumatic tyres of truck and bus.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 2977 Size designation, dimensions, inflation pressure and load capacity for truck tyres
GB/T 6326 Tyre terms and definitions (GB/T 6326-2005, ISO 4223-1:2002, Definitions of some terms used in tyre industry — Part 1: Pneumatic tyres, NEQ)
GB 9744 Truck tyres
