255/65R17 vs 255/70R16
255/70R16 is a safe swap for 255/65R17 by the usual ±3% rule: the diameter differs by +0.01%.
Speedometer and odometer
With 255/70R16 on a car calibrated for 255/65R17, the speedometer reads 60.0 mph when you're really doing 60, and the odometer under-counts by 0.0%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.0 mph |
| 45 mph | 45.0 mph |
| 60 mph | 60.0 mph |
| 70 mph | 70.0 mph |
| 80 mph | 80.0 mph |
Other sizes close to 255/65R17
- 255/65R17 vs 235/65R17-3.41%
- 255/65R17 vs 245/70R17+1.51%
- 255/65R17 vs 245/65R17-1.70%
- 255/65R17 vs 245/75R17+4.72%
- 255/65R17 vs 235/65R18-0.08%
- 255/65R17 vs 265/65R17+1.70%
- 255/65R17 vs 255/70R17+3.34%
- 255/65R17 vs 255/60R18-0.01%
- 255/65R17 vs 235/75R17+2.75%
- 255/65R17 vs 235/70R17-0.33%
- 255/65R17 vs 235/75R16-0.58%
- 255/65R17 vs 255/60R17-3.34%
Questions
Can I replace 255/65R17 with 255/70R16?
255/70R16 is a safe swap for 255/65R17 by the usual ±3% rule: the diameter differs by +0.01%.
What's the difference between 255/65R17 and 255/70R16?
255/70R16 is 0.00" taller and 0 mm wider; the sidewall is +0.50". At an indicated 60 mph you'd actually be doing 60.0 mph.
Will 255/70R16 fit on 255/65R17 wheels?
No — 255/65R17 needs a 17" wheel and 255/70R16 a 16" wheel. This is a plus/minus-size swap that changes wheels too.