Decoded notation
225 mm / 50% / R / 18 in
Popular Tire Sizes
225/50R18 Tire Size — Dimensions & Revs
Decode 225/50R18 and calculate nominal width, sidewall, overall diameter, circumference and revolutions.
Calculated dimensions are nominal values based on tire-size notation; actual measured dimensions vary.
Width225 mm
Sidewall height112.5 mm
Rim diameter18 in
Overall diameter682.2 mm
Overall diameter26.86 in
Circumference2143.2 mm
Revolutions per mile750.9
Revolutions per km466.6