Tyre Size Calculator

Width Profile Diameter Overall Diameter
mm % inches inches mm
mm % inches inches mm
Difference : Percent =  % Physical =  mm
NOTE: You can make up tyre sizes that do not exist, so check before getting too excited! You must also bear in mind rim size and clearance within your wheel arches.... Please note that this feature is presently being tested, should you find any faults, please tell us!