235/50R17 vs 245/50R17
245/50R17 is a safe swap for 235/50R17 by the usual ±3% rule: the diameter differs by +1.50%.
Speedometer and odometer
With 245/50R17 on a car calibrated for 235/50R17, the speedometer reads 59.1 mph when you're really doing 60, and the odometer under-counts by 1.5%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.4 mph |
| 45 mph | 45.7 mph |
| 60 mph | 60.9 mph |
| 70 mph | 71.0 mph |
| 80 mph | 81.2 mph |
Other sizes close to 235/50R17
- 235/50R17 vs 225/45R17-4.87%
- 235/50R17 vs 225/50R17-1.50%
- 235/50R17 vs 225/55R17+1.87%
- 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%
Questions
Can I replace 235/50R17 with 245/50R17?
245/50R17 is a safe swap for 235/50R17 by the usual ±3% rule: the diameter differs by +1.50%.
What's the difference between 235/50R17 and 245/50R17?
245/50R17 is 0.39" taller and 10 mm wider; the sidewall is +0.20". At an indicated 60 mph you'd actually be doing 60.9 mph.
Will 245/50R17 fit on 235/50R17 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.