Decoded notation
275 mm / 50% / R / 18 in
Popular Tire Sizes
275/50R18 Tire Size — Dimensions & Revs
Decode 275/50R18 and calculate nominal width, sidewall, overall diameter, circumference and revolutions.
Calculated dimensions are nominal values based on tire-size notation; actual measured dimensions vary.
Width275 mm
Sidewall height137.5 mm
Rim diameter18 in
Overall diameter732.2 mm
Overall diameter28.83 in
Circumference2300.3 mm
Revolutions per mile699.6
Revolutions per km434.7