Tire Size Calculator

This calculator will calculate tire diameter (height) from the standard information
given on the sidewall: width, aspect ratio, and wheel size.  Keep the tire diameter under 26.5" for all front and 26.7" for all rear tires.  Extra wide tires may have to be slightly smaller.

Tire width (mm):     Aspect ratio:     Wheel size (inches):

Tire diameter (inches) =
Tire section width (inches) =
Tire sidewall (inches) =