Decoded notation
255 mm / 60% / R / 20 in
Popular Tire Sizes
255/60R20 Tire Size — Dimensions & Revs
Decode 255/60R20 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 diameter20 in
Overall diameter814.0 mm
Overall diameter32.05 in
Circumference2557.3 mm
Revolutions per mile629.3
Revolutions per km391.0