Formula & method
A size such as 225/45R17 means 225 mm nominal section width, 45% aspect ratio, radial construction and a 17 in rim.
Example
225/45R17 → 225 mm width, 45% aspect ratio, R, 17 in rim.
Limitations
Calculated dimensions are nominal values based on tire-size notation; actual measured dimensions vary. These calculators compare nominal tire and wheel geometry. Actual fitment depends on the vehicle, wheel, tire model, suspension, brake clearance, load/speed ratings and local requirements. Verify final fitment before purchase or installation.