Use the TAB key to move between the fields then the ARROW keys to select the values
|TYRE SIZE CALCULATOR
|Select dimensions of tyres to determine the overall diameter
Matching overall diameters when changing wheel & tyre sizes
is necessary to ensure ride height and gearing /speedo readings don't change
(SHIFT+TAB reverses direction of selection) or use the MOUSE to select from the Drop Down Boxes
NOTE: It is possible to select Tyre sizes that are NOT actually available !!
CHECK sizes you have selected are actually AVAILABLE!!!
Tyre size Calculator from