GB9744-2024
Truck tyres
载重汽车轮胎
GB 9744-2024 is a current mandatory Chinese national standard for Truck tyres. It appears in the Electronics compliance cluster with a product safety focus and has an implementation date of May 1, 2025.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard applies to new pneumatic truck tyres (including micro, light, and heavy commercial vehicle tyres). It covers both bias and radial tyres used in freight transportation. It is mandatory for all manufacturers producing tires for the Chinese market. The standard does not apply to used or retreaded tires.
Technical requirements
The standard specifies comprehensive physical and safety requirements for truck tyres. It defines main parameters such as load index, ply rating, and allowable rims, alongside strict dimensional tolerances for overall width and outer diameter. Safety performance is a core focus, detailing minimum breaking energy requirements based on load index and rim diameter. It also mandates endurance performance and high-speed performance criteria, requiring tires to maintain structural integrity without delamination or cord breakage after rigorous testing. Tires must withstand specified durability tests without pressure drop or visual defects. New to this version are the environmental and efficiency parameters: rolling resistance performance and wet grip relative traction performance. These apply specifically to radial tires (excluding certain special-purpose or extreme-size tires), setting maximum limits for rolling resistance coefficients and minimum limits for wet grip indices. The standard also mandates specific tread wear indicators (minimum 1.6mm height) and detailed sidewall markings, including RADIAL, TUBELESS, and TRACTION designations where applicable.
Testing methods
Testing procedures involve measuring physical dimensions per GB/T 521 and conducting indoor performance tests per GB/T 4501 for strength, endurance, and high-speed capabilities. Rolling resistance is measured using the single-point test method in GB/T 29040, while wet grip is evaluated according to GB/T 35163. Results must be rounded according to GB/T 8170 to ensure accurate compliance verification.
FAQs
What products are regulated under GB 9744-2024?
The standard applies to new pneumatic tires for trucks, including micro, light, and heavy commercial vehicles. It covers both bias and radial tires, though certain performance requirements like rolling resistance are specific to radial variants.
What are the main updates in GB 9744-2024 compared to the 2015 version?
The 2024 version introduces mandatory requirements for rolling resistance performance and wet grip relative traction performance. It also updates minimum breaking energy values, modifies tire parameter regulations, and adds new marking requirements for special-purpose and traction-type tires.
Does GB 9744-2024 align with international ISO standards?
Yes, the standard references Chinese national standards (GB/T series) for testing methodologies, which share similarities with international ISO standards for rolling resistance and wet grip. However, manufacturers must verify compliance using the specific GB/T testing protocols referenced within the standard.
The summary above provides a high-level overview of GB 9744-2024. To ensure complete compliance for your truck tires entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 9744-2024 today to access all detailed parameter tables, appendices, and testing procedures.
Applicability hints
- Type
- Safety
- CCS
- G41
- ICS
- 83.160.10
- Competent department
- Ministry of Industry and Information Technology
- Technical committee
- National Technical Committee on Tyres and Rims of Standardization Administration of China
Relationships
Replaces:GB 9744-2015