Decoded notation
285 mm / 45% / R / 18 in
Popular Tire Sizes
285/45R18 Tire Size — Dimensions & Revs
Decode 285/45R18 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 height128.3 mm
Rim diameter18 in
Overall diameter713.7 mm
Overall diameter28.10 in
Circumference2242.2 mm
Revolutions per mile717.8
Revolutions per km446.0