Decoded notation
235 mm / 55% / R / 18 in
Popular Tire Sizes
235/55R18 Tire Size — Dimensions & Revs
Decode 235/55R18 and calculate nominal width, sidewall, overall diameter, circumference and revolutions.
Calculated dimensions are nominal values based on tire-size notation; actual measured dimensions vary.
Width235 mm
Sidewall height129.3 mm
Rim diameter18 in
Overall diameter715.7 mm
Overall diameter28.18 in
Circumference2248.4 mm
Revolutions per mile715.8
Revolutions per km444.8