235/75R16 vs 255/65R17
255/65R17 is a safe swap for 235/75R16 by the usual ±3% rule: the diameter differs by +0.58%.
Speedometer and odometer
With 255/65R17 on a car calibrated for 235/75R16, the speedometer reads 59.7 mph when you're really doing 60, and the odometer under-counts by 0.6%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.2 mph |
| 45 mph | 45.3 mph |
| 60 mph | 60.3 mph |
| 70 mph | 70.4 mph |
| 80 mph | 80.5 mph |
Other sizes close to 235/75R16
- 235/75R16 vs 245/75R16+1.98%
- 235/75R16 vs 225/75R16-1.98%
- 235/75R16 vs 265/70R16+2.44%
- 235/75R16 vs 235/70R16-3.10%
- 235/75R16 vs 245/70R16-1.25%
- 235/75R16 vs 225/70R16-4.94%
- 235/75R16 vs 255/70R16+0.59%
- 235/75R16 vs 215/85R16+1.71%
- 235/75R16 vs 30x9.50R15+0.41%
- 235/75R16 vs 235/70R17+0.25%
- 235/75R16 vs 255/65R16-2.77%
- 235/75R16 vs 275/70R16+4.28%
Questions
Can I replace 235/75R16 with 255/65R17?
255/65R17 is a safe swap for 235/75R16 by the usual ±3% rule: the diameter differs by +0.58%.
What's the difference between 235/75R16 and 255/65R17?
255/65R17 is 0.17" taller and 20 mm wider; the sidewall is -0.41". At an indicated 60 mph you'd actually be doing 60.3 mph.
Will 255/65R17 fit on 235/75R16 wheels?
No — 235/75R16 needs a 16" wheel and 255/65R17 a 17" wheel. This is a plus/minus-size swap that changes wheels too.