Decoded notation
255 mm / 60% / R / 18 in
Popular Tire Sizes
255/60R18 Tire Size — Dimensions & Revs
Decode 255/60R18 and calculate nominal width, sidewall, overall diameter, circumference and revolutions.
Calculated dimensions are nominal values based on tire-size notation; actual measured dimensions vary.
Width255 mm
Sidewall height153.0 mm
Rim diameter18 in
Overall diameter763.2 mm
Overall diameter30.05 in
Circumference2397.7 mm
Revolutions per mile671.2
Revolutions per km417.1