TYRE SIZE CALCULATOR


             
Scroll down then select dimensions of tyres to determine the overall diameter
Matching overall diameters if changing wheel & tyre sizes is necessary to ensure ride height & gearing don't change
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 recommend ±2.5% is the MAXIMUM difference in diameters
Difference in Diameter: percentage =  %    actual =  mm
Use the TAB key to move between the fields then the ARROW keys to select the values
(SHIFT+TAB reverses direction of selection) or the MOUSE selects from the Drop Down Boxes
Other Technical links:
Tyre Speed Ratings || Tyre Load Ratings || Vehicle Wheel Fitment

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