What does 10-15 mean?

Tire sizes are easy to understand once you learn how to read them.  On this page you'll find a color-coded explanation of the 10-15 tire code.

10-

This number indicates that your tire has a width of 10- millimeters.

R

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

RRadial
BBias Belt
DDiagonal
10

The tire size was designed to fit rims or wheels that are 10 inches in diameter.

1

The mark of 1 denotes your tire's load range, or ply rating.  A load range of 1 means that the tire has a ply rating of undefined.  Letters further along in the alphabet represent stronger tires that can sustain higher inflation pressures.  Tires with higher inflation pressures can carry heavier loads.