225/50R17 vs 245/50R17
245/50R17 is outside the ±3% rule as a replacement for 225/50R17: the diameter differs by +3.05%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
Speedometer and odometer
With 245/50R17 on a car calibrated for 225/50R17, the speedometer reads 58.2 mph when you're really doing 60, and the odometer under-counts by 3.0%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.9 mph |
| 45 mph | 46.4 mph |
| 60 mph | 61.8 mph |
| 70 mph | 72.1 mph |
| 80 mph | 82.4 mph |
Other sizes close to 225/50R17
- 225/50R17 vs 225/45R17-3.43%
- 225/50R17 vs 225/45R18+0.44%
- 225/50R17 vs 245/40R18-0.55%
- 225/50R17 vs 225/55R17+3.43%
- 225/50R17 vs 215/45R17-4.80%
- 225/50R17 vs 205/50R17-3.05%
- 225/50R17 vs 215/55R17+1.75%
- 225/50R17 vs 215/50R17-1.52%
- 225/50R17 vs 235/45R17-2.06%
- 225/50R17 vs 245/45R17-0.69%
- 225/50R17 vs 205/60R16-0.67%
- 225/50R17 vs 255/40R18+0.67%
Questions
Can I replace 225/50R17 with 245/50R17?
245/50R17 is outside the ±3% rule as a replacement for 225/50R17: the diameter differs by +3.05%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
What's the difference between 225/50R17 and 245/50R17?
245/50R17 is 0.79" taller and 20 mm wider; the sidewall is +0.39". At an indicated 60 mph you'd actually be doing 61.8 mph.
Will 245/50R17 fit on 225/50R17 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.