What do the numbers on tire sizes mean?

1 Answers
LeIris
07/29/25 2:18pm
Tire size markings represent the following: 1. The number before the slash indicates the tire width; 2. The number after the slash represents the aspect ratio; 3. The 'R' stands for radial construction; 4. The number following 'R' denotes the wheel diameter. Functions of tires include: 1. Transmitting driving force, braking force, and steering force for vehicle control; 2. Supporting vehicle load; 3. Absorbing vibrations and impacts during driving to prevent damage to auto components. Situations requiring tire replacement: 1. Tire deformation; 2. Severe carcass damage; 3. Significant tread damage; 4. Bead damage; 5. Sidewall bulges or cracks; 6. Run-flat damage; 7. Tires patched more than three times; 8. Tires worn to the tread wear indicator; 9. Chemical corrosion; 10. Severe aging or peeling.
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