Meaning of Tire Numbering?

1 Answers
Rodrigues
07/30/25 4:10am
Tire numbering refers to the internationally standardized tire code, typically located on the sidewall of the tire, indicating the section width and aspect ratio percentage, measured in millimeters. It includes the tire type, rim diameter (in inches), followed by the load index and speed rating. Below is a partial introduction to the 3T indices of tires: 1. Treadwear Index (TREADWEAR): Reflects the tire's wear resistance. A higher value indicates greater wear resistance but also means the tire is harder and less comfortable, and vice versa. Generally, a treadwear index between 280-320 is considered moderate, theoretically allowing for approximately 100,000 kilometers of driving. 2. Traction Index (TRACTION): Represents the tire's grip level, with the following letters indicating the strength of traction, ranked from highest to lowest as AA, A, B, and C. 3. Temperature Rating (TEMPERATUREA): Indicates the tire's temperature resistance, with the following letters representing the high-temperature resistance level, ranked from highest to lowest as A, B, and C for passenger car tires.
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