Decoded notation
275 mm / 65% / R / 18 in
Popular Tire Sizes
275/65R18 Tire Size — Dimensions & Revs
Decode 275/65R18 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 height178.8 mm
Rim diameter18 in
Overall diameter814.7 mm
Overall diameter32.07 in
Circumference2559.5 mm
Revolutions per mile628.8
Revolutions per km390.7