255/35R20 tire size

A 255/35R20 tire is 255 mm wide with a sidewall 35% of its width (89.2 mm), fits a 20-inch rim and has an overall diameter of 686 mm (27.0 in).

DimensionMetricImperial
Section width255 mm10.04 in
Sidewall height89.2 mm3.51 in
Rim diameter508.0 mm20 in
Overall diameter686.5 mm27.03 in
Circumference2,156.7 mm84.91 in
Revolutions464 per km746 per mile

Reading the size 255/35R20

255Width in mm35Aspect ratio (sidewall % of width)RRadial construction20Rim diameter in inches

The load index and speed rating (for example 91V) follow the size on the sidewall. Replacement tires should match or exceed the original load index and speed rating.

Alternative sizes within 3% of 255/35R20

A replacement size should stay within about 3% of the original diameter so the speedometer, ABS and transmission stay accurate. Always check clearance, load index and the vehicle manufacturer's approved sizes.

SizeDiameterDifferenceSpeedo reads 100 → actual
255/40R19687 mm+0.0%100.0Compare
215/65R16686 mm-0.1%99.9Compare
235/60R16688 mm+0.3%100.3Compare
215/60R17690 mm+0.5%100.5Compare
235/55R17690 mm+0.6%100.6Compare
225/50R18682 mm-0.6%99.4Compare
215/70R15682 mm-0.7%99.3
235/50R18692 mm+0.8%100.8

Compare 255/35R20 with any size →

Other 20-inch sizes

245/35R20245/40R20245/45R20245/50R20255/45R20255/50R20265/50R20275/40R20275/45R20275/55R20275/60R20275/65R20