215/65R17 vs 255/60R17
255/60R17 is outside the ±3% rule as a replacement for 215/65R17: the diameter differs by +3.73%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
Speedometer and odometer
With 255/60R17 on a car calibrated for 215/65R17, the speedometer reads 57.8 mph when you're really doing 60, and the odometer under-counts by 3.7%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 31.1 mph |
| 45 mph | 46.7 mph |
| 60 mph | 62.2 mph |
| 70 mph | 72.6 mph |
| 80 mph | 83.0 mph |
Other sizes close to 215/65R17
- 215/65R17 vs 225/55R17-4.50%
- 215/65R17 vs 225/65R17+1.83%
- 215/65R17 vs 235/55R18+0.62%
- 215/65R17 vs 235/65R17+3.66%
- 215/65R17 vs 235/55R17-2.95%
- 215/65R17 vs 225/60R17-1.34%
- 215/65R17 vs 225/55R18-0.93%
- 215/65R17 vs 235/60R17+0.35%
- 215/65R17 vs 215/70R16-0.55%
- 215/65R17 vs 215/60R17-3.02%
- 215/65R17 vs 235/65R16+0.08%
- 215/65R17 vs 245/50R17-4.85%
Questions
Can I replace 215/65R17 with 255/60R17?
255/60R17 is outside the ±3% rule as a replacement for 215/65R17: the diameter differs by +3.73%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
What's the difference between 215/65R17 and 255/60R17?
255/60R17 is 1.04" taller and 40 mm wider; the sidewall is +0.52". At an indicated 60 mph you'd actually be doing 62.2 mph.
Will 255/60R17 fit on 215/65R17 wheels?
Both use a 17" rim, so the wheel diameter matches; check the wheel's width range for a 255 mm tire and the fender clearance.