265/65R17 vs 255/70R17
255/70R17 is a safe swap for 265/65R17 by the usual ±3% rule: the diameter differs by +1.61%.
Speedometer and odometer
With 255/70R17 on a car calibrated for 265/65R17, the speedometer reads 59.0 mph when you're really doing 60, and the odometer under-counts by 1.6%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.5 mph |
| 45 mph | 45.7 mph |
| 60 mph | 61.0 mph |
| 70 mph | 71.1 mph |
| 80 mph | 81.3 mph |
Other sizes close to 265/65R17
- 265/65R17 vs 265/70R17+3.41%
- 265/65R17 vs 265/60R18-0.14%
- 265/65R17 vs 245/70R17-0.19%
- 265/65R17 vs 245/65R17-3.35%
- 265/65R17 vs 245/75R16-0.31%
- 265/65R17 vs 245/75R17+2.96%
- 265/65R17 vs 265/70R16+0.14%
- 265/65R17 vs 235/80R17+4.06%
- 265/65R17 vs 255/65R17-1.67%
- 265/65R17 vs 215/85R16-0.57%
- 265/65R17 vs 255/75R17+4.90%
- 265/65R17 vs 235/75R17+1.03%
Questions
Can I replace 265/65R17 with 255/70R17?
255/70R17 is a safe swap for 265/65R17 by the usual ±3% rule: the diameter differs by +1.61%.
What's the difference between 265/65R17 and 255/70R17?
255/70R17 is 0.49" taller and 10 mm narrower; the sidewall is +0.25". At an indicated 60 mph you'd actually be doing 61.0 mph.
Will 255/70R17 fit on 265/65R17 wheels?
Both use a 17" rim, so the wheel diameter matches; check the wheel's width range for a 255 mm tire and the fender clearance.