Decoded notation
255 mm / 70% / R / 17 in
Popular Tire Sizes
255/70R17 Tire Size — Dimensions & Revs
Decode 255/70R17 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 height178.5 mm
Rim diameter17 in
Overall diameter788.8 mm
Overall diameter31.06 in
Circumference2478.1 mm
Revolutions per mile649.4
Revolutions per km403.5