tire Size Calculator helps you determine tire size when you place larger wheels.

Enter the original tire size and the new wheel size into the form below.

The calculator will make a list of optional tire sizes for the new wheel.

Tyre Size Calculator

Powered by tire Size Calculator

original tire size
 / R
new wheel size

The optional tires have a diameter in the range of -3% to +4% of the difference between the outer tire diameter and the wheel diameter (D-W). This formula is used by leading tire manufacturers

tire interchangeability is not always possible, so be sure to consult your car manufacturer's manual before changing your tires. This is for informative purposes only.