T/SDXJ 004-2025 Spoke non-inflated bicycle tire

Scope

Main Technical Content: 4 Examples of Specification Presentation Methods: 5 Requirements 5.1 Appearance The appearance of spoke-type non-pneumatic bicycle tires shall comply with the requirements of Appendix C. 5.2 Dimensional Requirements The dimensional requirements for spoke-type non-pneumatic bicycle tires are as follows: - The dimensions of spoke-type non-pneumatic bicycle tires shall comply with the relevant requirements of GB/T 7377. - The dimensions of spoke-type non-pneumatic electric bicycle tires shall comply with the relevant requirements of GB/T 31548. 5.3 Performance Requirements Serial Number Item Test Performance Indicator Test Clause 1 Radial Fatigue Performance The radial fatigue test shall not allow cracks between the tire crown and spokes, or between the spokes and rim, or rim separation or disengagement. 6.3.12 Tire Fatigue Performance The tire fatigue test shall not allow tire crown disengagement from the spokes, nor shall cracks or scorch marks appear when the tire is cut open internally. 6.3.23 Impact Durability Performance After the test, the tire shall not exhibit structural body fractures, nor shall the tire crown disengage from the spokes. 6.3.32 Cut-open confirmation of the tire's internal integrity, with no fractures in the reinforcement material. 4 High/Low Temperature Disengagement Performance During the high/low temperature disengagement test, the tire shall not exhibit disengagement of the tire crown from the spokes. 6.3.45 Radial Impact Performance The radial impact test shall measure the tolerance values of radial and lateral runout changes. ≤2mm 6.3.56 Tire Speed Performance The tire speed test shall not allow tire crown disengagement from the spokes, visible cracks, or internal cracks or scorch marks. 6.3.67 Tire High/Low Temperature Aging Performance The tire high/low temperature aging test shall measure the tensile strength change rate P. P < 15% 6.3

Development Information

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