Decoded notation
255 mm / 35% / R / 18 in
Popular Tire Sizes
255/35R18 Tire Size — Dimensions & Revs
Decode 255/35R18 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 height89.3 mm
Rim diameter18 in
Overall diameter635.7 mm
Overall diameter25.03 in
Circumference1997.1 mm
Revolutions per mile805.8
Revolutions per km500.7