Tire sizes are simple to understand once you know how to read them. On this page you will find a detailed explanation of the P245/70R17 108S tire code.

245

This number indicates the tire has a width of 245 millimeters.

70

This number means that your tire has an aspect ratio of 70%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 70% of the width. In this case, the sidewall height is 0 millimeters.

R

This letter indicates how your tire was constructed. Radial is the standard construction method for 99% of all tires sold today.

17

The tire size was designed to fit rims or wheels that are 17 inches in diameter.