This document specifies the technical requirements, test methods, and marking of retreaded tyres for trucks and buses.
This document is applicable to the retreaded pneumatic tyres for trucks.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions 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 521 Test methods for measuring peripheral dimensions of tyres
GB/T 2977 Size designation, dimensions, inflation pressure and load capacity for truck tyres
GB/T 4501 Laboratory test methods for truck and bus tyre capabilities
GB/T 6326 Tyre - Vocabulary
GB 9744 Truck tyres
HG/T 2177 Appearance quality of tyres
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 6326 apply.
4 Technical requirements
4.1 Tyre selection
4.1.1 Tyres intended for retreading shall have the following information on their sidewall markings:
——Tyre specification;
——Speed symbol (or maximum driving speed);
——Load index (or maximum load-carrying capacity or level);
——"CCC" and other certification markings.
4.1.2 Tyres that fall under any of the following conditions shall not be used for retreading:
——The production date exceeds 5 years;
——There are obvious damages caused by overloading and underinflation;
——The carcass ruptures or undergoes abnormal deformation;
——The bead is broken or damaged;
——There is obvious erosion by oil or chemical substances or water;
——The tread is polished and the cord is exposed;
——The sidewall is worn and the cord is exposed;
——Any part of the tyre shows delamination or voids;
——The structure of the sidewall area is damaged;
——The inner liner is aged or damaged and cannot be repaired;
——The inner line of the tyre without the inner tube is aged or damaged and cannot be repaired;
——The belt has curled edges and looseness;;
——The carcass undergoes cord breakage or misalignment;
——Although the tread still has remaining patterns, the uneven local wear has damaged the breaker or belt;
——When the pre-vulcanized tread retreading method is adopted, there are continuous aging cracks on the sidewall and shoulder with a depth of 2mm or more; When the model retreading method is adopted, the shoulder has aging cracks or cuts that are deep into the casing or the ply.
4.1.3 The tyre carcass used for retreading may have penetration damage. The size, quantity and location of the most penetration damage shall meet those specified in Table 1, for diagonal tyres, these items shall meet those specified in Table 2.
Contents Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Technical requirements 5 Test methods 6 Marking
GB/T 7037-2025 Retreaded tyre for truck
1 Scope
This document specifies the technical requirements, test methods, and marking of retreaded tyres for trucks and buses.
This document is applicable to the retreaded pneumatic tyres for trucks.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions 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 521 Test methods for measuring peripheral dimensions of tyres
GB/T 2977 Size designation, dimensions, inflation pressure and load capacity for truck tyres
GB/T 4501 Laboratory test methods for truck and bus tyre capabilities
GB/T 6326 Tyre - Vocabulary
GB 9744 Truck tyres
HG/T 2177 Appearance quality of tyres
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 6326 apply.
4 Technical requirements
4.1 Tyre selection
4.1.1 Tyres intended for retreading shall have the following information on their sidewall markings:
——Tyre specification;
——Speed symbol (or maximum driving speed);
——Load index (or maximum load-carrying capacity or level);
——"CCC" and other certification markings.
4.1.2 Tyres that fall under any of the following conditions shall not be used for retreading:
——The production date exceeds 5 years;
——There are obvious damages caused by overloading and underinflation;
——The carcass ruptures or undergoes abnormal deformation;
——The bead is broken or damaged;
——There is obvious erosion by oil or chemical substances or water;
——The tread is polished and the cord is exposed;
——The sidewall is worn and the cord is exposed;
——Any part of the tyre shows delamination or voids;
——The structure of the sidewall area is damaged;
——The inner liner is aged or damaged and cannot be repaired;
——The inner line of the tyre without the inner tube is aged or damaged and cannot be repaired;
——The belt has curled edges and looseness;;
——The carcass undergoes cord breakage or misalignment;
——Although the tread still has remaining patterns, the uneven local wear has damaged the breaker or belt;
——When the pre-vulcanized tread retreading method is adopted, there are continuous aging cracks on the sidewall and shoulder with a depth of 2mm or more; When the model retreading method is adopted, the shoulder has aging cracks or cuts that are deep into the casing or the ply.
4.1.3 The tyre carcass used for retreading may have penetration damage. The size, quantity and location of the most penetration damage shall meet those specified in Table 1, for diagonal tyres, these items shall meet those specified in Table 2.
Contents of GB/T 7037-2025
Contents
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Technical requirements
5 Test methods
6 Marking
