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What does R15 on tires mean?

1 Answers

VanAaliyah

07/30/25 6:46am

R is the abbreviation of Radial, indicating that the tire has a radial structure; 15 is the outer diameter size of the rim, meaning it is 15 inches. Generally, the width of tires ranges between 145-285mm, with intervals of 10mm; while the aspect ratio of tires is between 30%-80%. Under normal circumstances, ordinary cars should not use tires with an aspect ratio greater than 75%, and luxury cars and high-performance sports cars are recommended to use tires with an aspect ratio less than 60%. Tires can be mainly classified by structure, tread pattern, type, and climate: 1. Tires classified by internal structure: can be divided into radial tires and bias tires. 2. Tires classified by surface tread pattern: can be divided into rib pattern tires, transverse pattern tires, mixed pattern tires, and off-road pattern tires. 3. Tires classified by vehicle type: can be divided into PC - passenger car tires, LT - light truck tires, TB - truck and bus tires, AG - agricultural vehicle tires, OTR - engineering vehicle tires, ID - industrial vehicle tires, AC - aircraft tires, MC - motorcycle tires. 4. Tires classified by climate: can be divided into winter snow tires, summer tires, and all-season tires.

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