235/55R17 vs 225/65R17
225/65R17 is outside the ±3% rule as a replacement for 235/55R17: the diameter differs by +4.93%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
Speedometer and odometer
With 225/65R17 on a car calibrated for 235/55R17, the speedometer reads 57.2 mph when you're really doing 60, and the odometer under-counts by 4.9%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 31.5 mph |
| 45 mph | 47.2 mph |
| 60 mph | 63.0 mph |
| 70 mph | 73.4 mph |
| 80 mph | 83.9 mph |
Other sizes close to 235/55R17
- 235/55R17 vs 225/50R17-4.85%
- 235/55R17 vs 225/55R17-1.59%
- 235/55R17 vs 235/50R18+0.28%
- 235/55R17 vs 215/55R17-3.19%
- 235/55R17 vs 225/60R17+1.67%
- 235/55R17 vs 215/65R16-0.64%
- 235/55R17 vs 235/60R17+3.40%
- 235/55R17 vs 215/65R17+3.04%
- 235/55R17 vs 215/60R17-0.07%
- 235/55R17 vs 235/50R17-3.40%
- 235/55R17 vs 255/45R18-0.52%
- 235/55R17 vs 215/55R18+0.49%
Questions
Can I replace 235/55R17 with 225/65R17?
225/65R17 is outside the ±3% rule as a replacement for 235/55R17: the diameter differs by +4.93%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
What's the difference between 235/55R17 and 225/65R17?
225/65R17 is 1.34" taller and 10 mm narrower; the sidewall is +0.67". At an indicated 60 mph you'd actually be doing 63.0 mph.
Will 225/65R17 fit on 235/55R17 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.