What do the letters and numbers on tires represent?

1 Answers
CarsonLynn
07/30/25 1:02am
The meanings of the numbers and letters on tires are as follows: Take a tire marked with 225/60-R17-99H as an example: 1. 225 represents the section width, which can be simply understood as the width of the tire tread; 2. 60 represents the aspect ratio, which can be simply understood as the height of the tire sidewall; 3. R represents the tire type code, where R stands for radial tire; 4. 17 represents the rim diameter, meaning the tire is suitable for 17-inch rims; 5. 99 represents the load index of the tire, indicating the maximum weight the tire can bear, with 99 corresponding to a maximum weight of 775KG; 6. H represents the speed rating of the tire, indicating the maximum speed the tire can handle, with H corresponding to a maximum speed of 210KM/H.
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