245/50R17 vs 235/55R17
235/55R17 is a safe swap for 245/50R17 by the usual ±3% rule: the diameter differs by +1.99%.
Speedometer and odometer
With 235/55R17 on a car calibrated for 245/50R17, the speedometer reads 58.8 mph when you're really doing 60, and the odometer under-counts by 2.0%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.6 mph |
| 45 mph | 45.9 mph |
| 60 mph | 61.2 mph |
| 70 mph | 71.4 mph |
| 80 mph | 81.6 mph |
Other sizes close to 245/50R17
- 245/50R17 vs 225/50R17-2.96%
- 245/50R17 vs 225/55R17+0.37%
- 245/50R17 vs 245/45R18+0.13%
- 245/50R17 vs 215/55R17-1.26%
- 245/50R17 vs 225/50R18+0.80%
- 245/50R17 vs 225/60R17+3.69%
- 245/50R17 vs 215/50R17-4.43%
- 245/50R17 vs 235/45R17-4.95%
- 245/50R17 vs 245/45R17-3.62%
- 245/50R17 vs 215/60R17+1.92%
- 245/50R17 vs 205/65R16-0.58%
- 245/50R17 vs 225/60R16-0.06%
Questions
Can I replace 245/50R17 with 235/55R17?
235/55R17 is a safe swap for 245/50R17 by the usual ±3% rule: the diameter differs by +1.99%.
What's the difference between 245/50R17 and 235/55R17?
235/55R17 is 0.53" taller and 10 mm narrower; the sidewall is +0.27". At an indicated 60 mph you'd actually be doing 61.2 mph.
Will 235/55R17 fit on 245/50R17 wheels?
Both use a 17" rim, so the wheel diameter matches; check the wheel's width range for a 235 mm tire and the fender clearance.