345/55R17 in inches

345/55R17 — what does it mean?

• 345 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
• 17 is a wheel diameter (or rim) in inches

How to convert 345 55R17 to inches?

First of all, we need to divide 345 mm (width) by 25.4 (mm to inch conversion), which will give us a width of 13.6″. Then, 55% of the 13.6″ will result in 7.5″ sidewall.

To get the total height or tire diameter, we need to sum the 17″ rim diameter with two of the sidewall heights. It will result in a 32″ total tire diameter (or height).

For your convenience, below is a table for 345/55R17 conversion to inches:

Alternatives to a 345/55R17 tire

If you're looking to upsize your 345 55R17 tires, try to stay within 3% deviation of an overall diameter for safety reasons.