What does 155R12 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 155R12 tire code.
This number indicates that your tire has a width of 155 millimeters.
This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.
The tire size was designed to fit rims or wheels that are 12 inches in diameter.