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What does 215/55R17 on a tire mean?

1 Answers

LaHarper

07/29/25 5:42pm

The meaning of the tire model 215/55R17 is: 215 represents the tire section width in millimeters. 55 is the aspect ratio, which is the ratio of the tire sidewall height to the tire section width, with 55 representing 55%. R is the abbreviation for Radial, indicating the tire has a radial structure, and 17 is the rim diameter in inches. Here is some additional information: 1. The sidewall of the tire may have an arrow or the word OUTER-SIDE, indicating the rotation direction of the tire. If there is a small umbrella symbol on the sidewall, it means the tire is suitable for driving in rainy or slippery conditions. 2. Some tires may also include other letters or symbols with special meanings: "X" indicates a high-pressure tire; "C" indicates a reinforced type; "B" indicates a bias-ply tire; "-" indicates a low-pressure tire. M and S are abbreviations for Mud and Snow, respectively, indicating that the tire is suitable for use on snowy and muddy roads.

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