Tire Size Comparator
Parse and compare tire size codes like 225/45R17 by diameter and revs
diameter = rim × 25.4 + 2 × (width × aspect / 100)
Primary 225/45R17
Sidewall 101.3 mm
Diameter 634.3 mm (24.97″)
Circ. 1.993 m
Revs/mi 808
Compare 245/45R17
Sidewall 110.3 mm
Diameter 652.3 mm (25.68″)
Circ. 2.049 m
Revs/mi 785
Δ +2.84%