255/70R16 vs 225/75R17
225/75R17 is a safe swap for 255/70R16 by the usual ±3% rule: the diameter differs by +0.77%.
Speedometer and odometer
With 225/75R17 on a car calibrated for 255/70R16, the speedometer reads 59.5 mph when you're really doing 60, and the odometer under-counts by 0.8%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.2 mph |
| 45 mph | 45.3 mph |
| 60 mph | 60.5 mph |
| 70 mph | 70.5 mph |
| 80 mph | 80.6 mph |
Other sizes close to 255/70R16
- 255/70R16 vs 245/75R16+1.38%
- 255/70R16 vs 225/75R16-2.55%
- 255/70R16 vs 265/70R16+1.83%
- 255/70R16 vs 235/70R16-3.67%
- 255/70R16 vs 245/70R16-1.83%
- 255/70R16 vs 255/65R17-0.01%
- 255/70R16 vs 215/85R16+1.11%
- 255/70R16 vs 30x9.50R15-0.18%
- 255/70R16 vs 235/70R17-0.34%
- 255/70R16 vs 235/75R16-0.59%
- 255/70R16 vs 255/65R16-3.34%
- 255/70R16 vs 275/70R16+3.67%
Questions
Can I replace 255/70R16 with 225/75R17?
225/75R17 is a safe swap for 255/70R16 by the usual ±3% rule: the diameter differs by +0.77%.
What's the difference between 255/70R16 and 225/75R17?
225/75R17 is 0.23" taller and 30 mm narrower; the sidewall is -0.38". At an indicated 60 mph you'd actually be doing 60.5 mph.
Will 225/75R17 fit on 255/70R16 wheels?
No — 255/70R16 needs a 16" wheel and 225/75R17 a 17" wheel. This is a plus/minus-size swap that changes wheels too.