255/70R17 vs 275/70R16
275/70R16 is a safe swap for 255/70R17 by the usual ±3% rule: the diameter differs by +0.33%.
Speedometer and odometer
With 275/70R16 on a car calibrated for 255/70R17, the speedometer reads 59.8 mph when you're really doing 60, and the odometer under-counts by 0.3%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.1 mph |
| 45 mph | 45.1 mph |
| 60 mph | 60.2 mph |
| 70 mph | 70.2 mph |
| 80 mph | 80.3 mph |
Other sizes close to 255/70R17
- 255/70R17 vs 265/70R17+1.77%
- 255/70R17 vs 245/70R17-1.77%
- 255/70R17 vs 245/65R17-4.88%
- 255/70R17 vs 245/75R17+1.33%
- 255/70R17 vs 265/65R17-1.58%
- 255/70R17 vs 235/80R17+2.41%
- 255/70R17 vs 255/65R18-0.01%
- 255/70R17 vs 255/65R17-3.23%
- 255/70R17 vs 255/75R17+3.23%
- 255/70R17 vs 235/75R17-0.57%
- 255/70R17 vs 275/70R17+3.55%
- 255/70R17 vs 235/70R17-3.55%
Questions
Can I replace 255/70R17 with 275/70R16?
275/70R16 is a safe swap for 255/70R17 by the usual ±3% rule: the diameter differs by +0.33%.
What's the difference between 255/70R17 and 275/70R16?
275/70R16 is 0.10" taller and 20 mm wider; the sidewall is +0.55". At an indicated 60 mph you'd actually be doing 60.2 mph.
Will 275/70R16 fit on 255/70R17 wheels?
No — 255/70R17 needs a 17" wheel and 275/70R16 a 16" wheel. This is a plus/minus-size swap that changes wheels too.