105/80R13 in inches

105/80R13 — what does it mean?

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

How to convert 105 80R13 to inches?

First of all, we need to divide 105 mm (width) by 25.4 (mm to inch conversion), which will give us a width of 4.1″. Then, 80% of the 4.1″ will result in 3.3″ sidewall.

To get the total height or tire diameter, we need to sum the 13″ rim diameter with two of the sidewall heights. It will result in a 19.6″ total tire diameter (or height).

For your convenience, below is a table for 105/80R13 conversion to inches:

Alternatives to a 105/80R13 tire

If you're looking to upsize your 105 80R13 tires, try to stay within 3% deviation of an overall diameter for safety reasons.