Tyre Size Calculator
Calculate Tyre Dimensions for Plus Sizing/Up-Stepping
Enter the original tyre size and the new wheel size into the form below. The calculator will make a list of alternatives that have a diameter in the range of -3% to +4% of the difference between the outer tyre diameter and the wheel diameter (D-W). This formula is used by leading tyre manufacturers.
Note:
Tyre interchangeability is not always possible, so
be sure to consult your car manufacturer's manual before changing your tyres. This is for informative purposes only.
