Decoded notation
245 mm / 55% / R / 20 in
Popular Tire Sizes
245/55R20 Tire Size — Dimensions & Revs
Decode 245/55R20 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 height134.8 mm
Rim diameter20 in
Overall diameter777.5 mm
Overall diameter30.61 in
Circumference2442.6 mm
Revolutions per mile658.9
Revolutions per km409.4