Tyre Height:
This will calculate tyre height based on the numbers on the side of your tyre. For example: 245\50\16. The first number is the width in millimeters of the Tyre from bead to bead. The second the aspect ratio of the sidewall as compared to the width - in this example it's 50% of the width. The last number is the size of the rim in inches.


Note: This is the size of the tyre inflated and off the ground. When under load from the cars weight, the tyre's radius is reduced by approximately one inch. This one inch reduction is fairly consistent with all types of tyres and vehicles, although the lower the profile, the less reduction there is. - Remember this is an approximated value.

Tyre Height: inches
Tyre Radius: inches