225/65R17 vs 245/65R17
245/65R17 is outside the ±3% rule as a replacement for 225/65R17: the diameter differs by +3.59%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
Speedometer and odometer
With 245/65R17 on a car calibrated for 225/65R17, the speedometer reads 57.9 mph when you're really doing 60, and the odometer under-counts by 3.6%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 31.1 mph |
| 45 mph | 46.6 mph |
| 60 mph | 62.2 mph |
| 70 mph | 72.5 mph |
| 80 mph | 82.9 mph |
Other sizes close to 225/65R17
- 225/65R17 vs 235/65R17+1.79%
- 225/65R17 vs 235/55R17-4.69%
- 225/65R17 vs 225/60R18+0.40%
- 225/65R17 vs 225/60R17-3.11%
- 225/65R17 vs 235/60R17-1.45%
- 225/65R17 vs 215/65R17-1.79%
- 225/65R17 vs 215/60R17-4.76%
- 225/65R17 vs 225/70R16-0.40%
- 225/65R17 vs 245/55R18+0.33%
- 225/65R17 vs 255/60R17+1.86%
- 225/65R17 vs 275/55R17+1.38%
Questions
Can I replace 225/65R17 with 245/65R17?
245/65R17 is outside the ±3% rule as a replacement for 225/65R17: the diameter differs by +3.59%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
What's the difference between 225/65R17 and 245/65R17?
245/65R17 is 1.02" taller and 20 mm wider; the sidewall is +0.51". At an indicated 60 mph you'd actually be doing 62.2 mph.
Will 245/65R17 fit on 225/65R17 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.