What Do the Letters on Tires Represent in Terms of Speed Ratings?

1 Answers
OMadelyn
07/29/25 10:11am
The letters on tires represent the following speed ratings: 1. Q-160km/h; 2. R-170km/h; 3. S-180km/h; 4. T-190km/h; 5. H-210km/h; 6. V-240km/h; 7. W-270km/h; 8. Y-300km/h; 9. Z: ZR speed exceeds 240km/h. Below is relevant information about speed ratings: 1. The speed rating indicates the maximum speed at which a tire can carry a specified load under defined conditions. Different tires display their speed ratings with English letters on the sidewall, representing certified speed ratings ranging from 4.8 km/h to 300 km/h. 2. Typically, a series of numbers and letters on the tire sidewall denotes the tire specifications, with the last letter in this series representing the speed rating.
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