What does 325-30R20 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 325-30R20 tire code.
325 | This number indicates that your tire has a width of 325 millimeters. | ||||||
20 | The tire size was designed to fit rims or wheels that are 20 inches in diameter. | ||||||
30 | This number means that your tire has an aspect ratio of 30%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 30% of the width. In this case, the sidewall height works out to be 97 millimeters. | ||||||
R | This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.
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