255/60R17 vs 245/65R17
245/65R17 is a safe swap for 255/60R17 by the usual ±3% rule: the diameter differs by +1.69%.
Speedometer and odometer
With 245/65R17 on a car calibrated for 255/60R17, the speedometer reads 59.0 mph when you're really doing 60, and the odometer under-counts by 1.7%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.5 mph |
| 45 mph | 45.8 mph |
| 60 mph | 61.0 mph |
| 70 mph | 71.2 mph |
| 80 mph | 81.4 mph |
Other sizes close to 255/60R17
- 255/60R17 vs 235/60R18+0.19%
- 255/60R17 vs 225/65R17-1.83%
- 255/60R17 vs 235/65R17-0.07%
- 255/60R17 vs 225/60R17-4.88%
- 255/60R17 vs 255/55R18-0.01%
- 255/60R17 vs 225/75R16+0.83%
- 255/60R17 vs 235/70R16-0.33%
- 255/60R17 vs 235/60R17-3.25%
- 255/60R17 vs 215/65R17-3.59%
- 255/60R17 vs 255/65R17+3.46%
- 255/60R17 vs 235/70R17+3.12%
- 255/60R17 vs 255/65R16+0.01%
Questions
Can I replace 255/60R17 with 245/65R17?
245/65R17 is a safe swap for 255/60R17 by the usual ±3% rule: the diameter differs by +1.69%.
What's the difference between 255/60R17 and 245/65R17?
245/65R17 is 0.49" taller and 10 mm narrower; the sidewall is +0.25". At an indicated 60 mph you'd actually be doing 61.0 mph.
Will 245/65R17 fit on 255/60R17 wheels?
Both use a 17" rim, so the wheel diameter matches; check the wheel's width range for a 245 mm tire and the fender clearance.