Decoded notation
235 mm / 45% / R / 18 in
Popular Tire Sizes
235/45R18 Tire Size — Dimensions & Revs
Decode 235/45R18 and calculate nominal width, sidewall, overall diameter, circumference and revolutions.
Calculated dimensions are nominal values based on tire-size notation; actual measured dimensions vary.
Width235 mm
Sidewall height105.8 mm
Rim diameter18 in
Overall diameter668.7 mm
Overall diameter26.33 in
Circumference2100.8 mm
Revolutions per mile766.1
Revolutions per km476.0