205/50R17 vs 235/45R17
235/45R17 is a safe swap for 205/50R17 by the usual ±3% rule: the diameter differs by +1.02%.
Speedometer and odometer
With 235/45R17 on a car calibrated for 205/50R17, the speedometer reads 59.4 mph when you're really doing 60, and the odometer under-counts by 1.0%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.3 mph |
| 45 mph | 45.5 mph |
| 60 mph | 60.6 mph |
| 70 mph | 70.7 mph |
| 80 mph | 80.8 mph |
Other sizes close to 205/50R17
- 205/50R17 vs 225/45R17-0.39%
- 205/50R17 vs 225/40R18+0.06%
- 205/50R17 vs 225/50R17+3.14%
- 205/50R17 vs 205/55R16-0.77%
- 205/50R17 vs 215/45R17-1.81%
- 205/50R17 vs 215/55R17+4.95%
- 205/50R17 vs 215/50R17+1.57%
- 205/50R17 vs 245/45R17+2.43%
- 205/50R17 vs 215/55R16+0.96%
- 205/50R17 vs 255/35R18-0.17%
- 205/50R17 vs 245/40R17-1.41%
- 205/50R17 vs 205/45R17-3.22%
Questions
Can I replace 205/50R17 with 235/45R17?
235/45R17 is a safe swap for 205/50R17 by the usual ±3% rule: the diameter differs by +1.02%.
What's the difference between 205/50R17 and 235/45R17?
235/45R17 is 0.26" taller and 30 mm wider; the sidewall is +0.13". At an indicated 60 mph you'd actually be doing 60.6 mph.
Will 235/45R17 fit on 205/50R17 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.