Decoded notation
285 mm / 65% / R / 18 in
Popular Tire Sizes
285/65R18 Tire Size — Dimensions & Revs
Decode 285/65R18 and calculate nominal width, sidewall, overall diameter, circumference and revolutions.
Calculated dimensions are nominal values based on tire-size notation; actual measured dimensions vary.
Width285 mm
Sidewall height185.3 mm
Rim diameter18 in
Overall diameter827.7 mm
Overall diameter32.59 in
Circumference2600.3 mm
Revolutions per mile618.9
Revolutions per km384.6