TYRE SIZE CALCULATOR from Wheel Fitment Guide

Select the dimensions of your tyres to determine the overall diameter
Correct matching of overall diameter when changing wheel and tyre sizes,this
is necessary to ensure ride height and gearing remain similar

 

Scroll down then select dimensions of tyres to determine the overall diameter 
Old »
Tyre »
Size »		 Tread
Width		 Profile
Height		 Wheel
Diameter		 Overall
Tyre Diameter
  mm   %   inches   inches   mm
It is quite easy to select impossible tyre sizes or sizes that are not made!
New »
Tyre »
Size »		   mm   %   inches   inches   mm
We suggest ±2.5% is the MAXIMUM difference in diameters
Difference in Diameter: percentage =  % actual =  mm