Decoded notation
255 mm / 30% / R / 19 in
Popular Tire Sizes
255/30R19 Tire Size — Dimensions & Revs
Decode 255/30R19 and calculate nominal width, sidewall, overall diameter, circumference and revolutions.
Calculated dimensions are nominal values based on tire-size notation; actual measured dimensions vary.
Width255 mm
Sidewall height76.5 mm
Rim diameter19 in
Overall diameter635.6 mm
Overall diameter25.02 in
Circumference1996.8 mm
Revolutions per mile806.0
Revolutions per km500.8