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%