235/50R17 vs 225/55R17
225/55R17 is a safe swap for 235/50R17 by the usual ±3% rule: the diameter differs by +1.87%.
Speedometer and odometer
With 225/55R17 on a car calibrated for 235/50R17, the speedometer reads 58.9 mph when you're really doing 60, and the odometer under-counts by 1.9%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.6 mph |
| 45 mph | 45.8 mph |
| 60 mph | 61.1 mph |
| 70 mph | 71.3 mph |
| 80 mph | 81.5 mph |
Other sizes close to 235/50R17
- 235/50R17 vs 225/45R17-4.87%
- 235/50R17 vs 225/50R17-1.50%
- 235/50R17 vs 235/45R18+0.28%
- 235/50R17 vs 235/55R17+3.52%
- 235/50R17 vs 205/50R17-4.50%
- 235/50R17 vs 215/55R17+0.22%
- 235/50R17 vs 215/50R17-3.00%
- 235/50R17 vs 235/45R17-3.52%
- 235/50R17 vs 245/45R17-2.17%
- 235/50R17 vs 215/60R16-0.36%
- 235/50R17 vs 255/40R18-0.84%
- 235/50R17 vs 215/60R17+3.45%
Questions
Can I replace 235/50R17 with 225/55R17?
225/55R17 is a safe swap for 235/50R17 by the usual ±3% rule: the diameter differs by +1.87%.
What's the difference between 235/50R17 and 225/55R17?
225/55R17 is 0.49" taller and 10 mm narrower; the sidewall is +0.25". At an indicated 60 mph you'd actually be doing 61.1 mph.
Will 225/55R17 fit on 235/50R17 wheels?
Both use a 17" rim, so the wheel diameter matches; check the wheel's width range for a 225 mm tire and the fender clearance.