From September to October 2022, MIIT issued a call for comments on two revised mandatory standards for tyres:
- Truck tyres (draft for comments)
- Passenger car tyres (draft for comments)
These two standards stipulate the technical requirements, test methods, inspection rules and determination principles, labelling, and implementation of tyres of truck and passenger cars, respectively. They apply to new pneumatic tyres of trucks and passenger cars. The 2015 editions, i.e., GB 9744-2015 and GB 9743-2015 will be replaced once the new standards come into force.
Adopted by the CCC scheme, the two standards have received extensive attention from the tyre industry since the revision had begun. According to the drafts for comments, the main changes are i) rolling resistance limit was introduced, aiming to increase vehicles’ energy efficiency and thus contributing to the “carbon peak and neutrality” objectives in the tyre sector. ii) wet grip limit was added, aiming to improve the safety of tyres running on wet roads.
DOT/FMSS119, FMSS139 in the US, and ECE54, ECE30, and ECE R117 in the EU were used for reference in the development of the two standards, but China’s actual situation was also considered, resulting in the introduction of rolling resistance and wet grip limits. Besides, requirements for pass-by noise of tyre is not included in the drafts.
The National Technical Committee of Tyres and Rims Standardisation, the drafting body of both standards, recommended implementing these standards 12 months after release, while the implementation date for the requirements on rolling resistance and wet grip limits can be put off another 12 months.
