Decoded notation
215 mm / 45% / R / 18 in
Popular Tire Sizes
215/45R18 Tire Size — Dimensions & Revs
Decode 215/45R18 and calculate nominal width, sidewall, overall diameter, circumference and revolutions.
Calculated dimensions are nominal values based on tire-size notation; actual measured dimensions vary.
Width215 mm
Sidewall height96.8 mm
Rim diameter18 in
Overall diameter650.7 mm
Overall diameter25.62 in
Circumference2044.2 mm
Revolutions per mile787.3
Revolutions per km489.2