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What do the letters in car tire ratings mean?

1 Answers
VonAlice
09/06/25 3:33am

Car tire rating letters refer to the certified speed rating of the tire from 4.8km/h to 300km/h, which indicates the maximum speed the tire can withstand. The further back the letter representing the tire's speed rating is in the alphabet, the better the performance of that tire. Tires with different speed ratings have different applicable ranges. Tires are usually mounted on metal rims to support the vehicle body, cushion external impacts, maintain contact with the road surface, and ensure the vehicle's driving performance. Tires often operate under complex and demanding conditions, enduring various deformations, loads, forces, and high/low temperature effects during driving, therefore they must possess high load-bearing capacity, traction performance, and cushioning properties.

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