Decoded notation
305 mm / 60% / R / 20 in
Popular Tire Sizes
305/60R20 Tire Size — Dimensions & Revs
Decode 305/60R20 and calculate nominal width, sidewall, overall diameter, circumference and revolutions.
Calculated dimensions are nominal values based on tire-size notation; actual measured dimensions vary.
Width305 mm
Sidewall height183.0 mm
Rim diameter20 in
Overall diameter874.0 mm
Overall diameter34.41 in
Circumference2745.8 mm
Revolutions per mile586.1
Revolutions per km364.2