325/55R22 in inches

325/55R22 — what does it mean?

• 325 stands for tread width in millimeters
• 55 is an aspect ration between the tread width and the sidewall in percents
• R means that the tire has a radial construction
• 22 is a wheel diameter (or rim) in inches

How to convert 325 55R22 to inches?

First of all, we need to divide 325 mm (width) by 25.4 (mm to inch conversion), which will give us a width of 12.8″. Then, 55% of the 12.8″ will result in 7″ sidewall.

To get the total height or tire diameter, we need to sum the 22″ rim diameter with two of the sidewall heights. It will result in a 36″ total tire diameter (or height).

For your convenience, below is a table for 325/55R22 conversion to inches:

Alternatives to a 325/55R22 tire

If you're looking to upsize your 325 55R22 tires, try to stay within 3% deviation of an overall diameter for safety reasons.