Decoded notation
265 mm / 40% / R / 18 in
Popular Tire Sizes
265/40R18 Tire Size — Dimensions & Revs
Decode 265/40R18 and calculate nominal width, sidewall, overall diameter, circumference and revolutions.
Calculated dimensions are nominal values based on tire-size notation; actual measured dimensions vary.
Width265 mm
Sidewall height106.0 mm
Rim diameter18 in
Overall diameter669.2 mm
Overall diameter26.35 in
Circumference2102.4 mm
Revolutions per mile765.5
Revolutions per km475.7