Decoded notation
185 mm / 55% / R / 13 in
Popular Tire Sizes
185/55R13 Tire Size — Dimensions & Revs
Decode 185/55R13 and calculate nominal width, sidewall, overall diameter, circumference and revolutions.
Calculated dimensions are nominal values based on tire-size notation; actual measured dimensions vary.
Width185 mm
Sidewall height101.8 mm
Rim diameter13 in
Overall diameter533.7 mm
Overall diameter21.01 in
Circumference1676.7 mm
Revolutions per mile959.8
Revolutions per km596.4