What Does the Tire Code on a Car Mean?

1 Answers
VonNova
07/29/25 4:52pm
Car tire codes refer to the meanings of various symbols on the tire. These include the tire specifications, ply rating, rim specifications, speed rating, etc. A detailed explanation is as follows: 1. Tire specifications: Usually represented by a set of numbers, where the first number indicates the tire section width and the latter denotes the rim diameter, measured in inches. 2. Ply rating: The ply rating refers to the nominal number of cord layers in the tire rubber, which may not exactly match the actual number of cord layers. It is an important indicator of tire strength. 3. Rim specifications: Indicate the rim specifications compatible with the tire, facilitating practical use. 4. Speed rating: The maximum speed at which the tire can carry the specified load under defined conditions. Letters from A to Z represent certified speed ratings ranging from 4.8 km/h to 300 km/h. Common speed ratings include: Q: 160 km/h; R: 170 km/h; S: 180 km/h; T: 190 km/h; H: 210 km/h; V: 240 km/h; W: 270 km/h; Y: 300 km/h; Z: ZR speed above 240 km/h.
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