255/70R16 vs 245/75R16
245/75R16 is a safe swap for 255/70R16 by the usual ±3% rule: the diameter differs by +1.38%.
Speedometer and odometer
With 245/75R16 on a car calibrated for 255/70R16, the speedometer reads 59.2 mph when you're really doing 60, and the odometer under-counts by 1.4%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.4 mph |
| 45 mph | 45.6 mph |
| 60 mph | 60.8 mph |
| 70 mph | 71.0 mph |
| 80 mph | 81.1 mph |
Other sizes close to 255/70R16
- 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%
- 255/70R16 vs 225/75R17+0.77%
Questions
Can I replace 255/70R16 with 245/75R16?
245/75R16 is a safe swap for 255/70R16 by the usual ±3% rule: the diameter differs by +1.38%.
What's the difference between 255/70R16 and 245/75R16?
245/75R16 is 0.41" taller and 10 mm narrower; the sidewall is +0.21". At an indicated 60 mph you'd actually be doing 60.8 mph.
Will 245/75R16 fit on 255/70R16 wheels?
Both use a 16" rim, so the wheel diameter matches; check the wheel's width range for a 245 mm tire and the fender clearance.