215/55R17 vs 245/50R17
245/50R17 is a safe swap for 215/55R17 by the usual ±3% rule: the diameter differs by +1.27%.
Speedometer and odometer
With 245/50R17 on a car calibrated for 215/55R17, the speedometer reads 59.2 mph when you're really doing 60, and the odometer under-counts by 1.3%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.4 mph |
| 45 mph | 45.6 mph |
| 60 mph | 60.8 mph |
| 70 mph | 70.9 mph |
| 80 mph | 81.0 mph |
Other sizes close to 215/55R17
- 215/55R17 vs 225/50R17-1.72%
- 215/55R17 vs 225/55R17+1.65%
- 215/55R17 vs 235/45R18+0.06%
- 215/55R17 vs 235/55R17+3.29%
- 215/55R17 vs 205/50R17-4.71%
- 215/55R17 vs 215/50R17-3.22%
- 215/55R17 vs 235/45R17-3.74%
- 215/55R17 vs 245/45R17-2.39%
- 215/55R17 vs 215/60R16-0.58%
- 215/55R17 vs 215/60R17+3.22%
- 215/55R17 vs 205/65R16+0.69%
- 215/55R17 vs 235/50R17-0.22%
Questions
Can I replace 215/55R17 with 245/50R17?
245/50R17 is a safe swap for 215/55R17 by the usual ±3% rule: the diameter differs by +1.27%.
What's the difference between 215/55R17 and 245/50R17?
245/50R17 is 0.33" taller and 30 mm wider; the sidewall is +0.17". At an indicated 60 mph you'd actually be doing 60.8 mph.
Will 245/50R17 fit on 215/55R17 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.