What Do the Letters on Tires Mean?

[StLane]

Tire letters represent tire specifications. Here is the relevant information: 1. Specific details: Most tire model markings are in the form of: 215/70R15. The meanings of these numbers are as follows: 215 indicates the tire section width in millimeters (mm), generally ranging from 145 to 285mm in 10mm intervals; 70 is the aspect ratio, which is the ratio of the tire sidewall height to the tire section width, with 70 representing 70%. Generally, tire aspect ratios range between 30% and 80%. 2. Tire specifications: Tire specifications are commonly represented by a set of numbers. The first number indicates the tire section width, and the latter indicates the rim diameter in inches. For example, 165/70R14 denotes a radial tire with a width of 165 millimeters, an aspect ratio of 70, and a rim diameter of 14 inches.