TYRE SIZE CALCULATOR from www.tyresave.co.uk

Note:- This calculator has had a modification to the code to accommodate sizes not originally catered for, no responsibility on the accuracy can be attributed to Tyresave who kindly provided the original page.

Do Visit www.tyresave.co.uk for your wheel requirements they provided me with a great deal on my alloys and great service.

Select the dimensions of your tyres to determine the overall diameter
Correct matching of overall diameter when changing wheel and tyre sizes
is necessary to ensure ride height and gearing remain the same
Tread Width Profile Height Wheel Diameter Overall Tyre Diameter
  mm   %   inches   inches   mm
(NOTE: it is quite possible to select impossible tyre sizes or sizes that are not made!)
Use the TAB key to move between the fields then use the ARROW keys to select the values.
(SHIFT+TAB reverses direction of selection)
Tread Width Profile Height Wheel Diameter Overall Tyre Diameter
  mm   %   inches   inches   mm
(NOTE: it is quite possible to select impossible tyre sizes or sizes that are not made!)