Decoded notation
265 mm / 40% / R / 21 in
Popular Tire Sizes
265/40R21 Tire Size — Dimensions & Revs
Decode 265/40R21 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 diameter21 in
Overall diameter745.4 mm
Overall diameter29.35 in
Circumference2341.7 mm
Revolutions per mile687.2
Revolutions per km427.0