Decoded notation
225 mm / 65% / R / 18 in
Popular Tire Sizes
225/65R18 Tire Size — Dimensions & Revs
Decode 225/65R18 and calculate nominal width, sidewall, overall diameter, circumference and revolutions.
Calculated dimensions are nominal values based on tire-size notation; actual measured dimensions vary.
Width225 mm
Sidewall height146.3 mm
Rim diameter18 in
Overall diameter749.7 mm
Overall diameter29.52 in
Circumference2355.3 mm
Revolutions per mile683.3
Revolutions per km424.6