Decoded notation
185 mm / 55% / R / 15 in
Popular Tire Sizes
185/55R15 Tire Size — Dimensions & Revs
Decode 185/55R15 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 diameter15 in
Overall diameter584.5 mm
Overall diameter23.01 in
Circumference1836.3 mm
Revolutions per mile876.4
Revolutions per km544.6