Decoded notation
245 mm / 30% / R / 18 in
Popular Tire Sizes
245/30R18 Tire Size — Dimensions & Revs
Decode 245/30R18 and calculate nominal width, sidewall, overall diameter, circumference and revolutions.
Calculated dimensions are nominal values based on tire-size notation; actual measured dimensions vary.
Width245 mm
Sidewall height73.5 mm
Rim diameter18 in
Overall diameter604.2 mm
Overall diameter23.79 in
Circumference1898.2 mm
Revolutions per mile847.8
Revolutions per km526.8