255/50R20 tire size
A 255/50R20 tire is 255 mm wide with a sidewall 50% of its width (127.5 mm), fits a 20-inch rim and has an overall diameter of 763 mm (30.0 in).
| Dimension | Metric | Imperial |
|---|---|---|
| Section width | 255 mm | 10.04 in |
| Sidewall height | 127.5 mm | 5.02 in |
| Rim diameter | 508.0 mm | 20 in |
| Overall diameter | 763.0 mm | 30.04 in |
| Circumference | 2,397.0 mm | 94.37 in |
| Revolutions | 417 per km | 671 per mile |
Reading the size 255/50R20
255Width in mm50Aspect 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 255/50R20
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.
Compare 255/50R20 with any size →