225/70R16 vs 255/65R16
255/65R16 is a safe swap for 225/70R16 by the usual ±3% rule: the diameter differs by +2.29%.
Speedometer and odometer
With 255/65R16 on a car calibrated for 225/70R16, the speedometer reads 58.7 mph when you're really doing 60, and the odometer under-counts by 2.3%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.7 mph |
| 45 mph | 46.0 mph |
| 60 mph | 61.4 mph |
| 70 mph | 71.6 mph |
| 80 mph | 81.8 mph |
Other sizes close to 225/70R16
- 225/70R16 vs 225/65R17+0.40%
- 225/70R16 vs 225/75R16+3.12%
- 225/70R16 vs 235/70R16+1.94%
- 225/70R16 vs 215/65R16-4.92%
- 225/70R16 vs 215/70R16-1.94%
- 225/70R16 vs 235/65R16-1.32%
- 225/70R16 vs 245/70R16+3.88%
- 225/70R16 vs 225/65R16-3.12%
- 225/70R16 vs 235/60R16-4.57%
- 225/70R16 vs 195/75R16-3.12%
- 225/70R16 vs 205/70R16-3.88%
- 225/70R16 vs 225/75R15-0.40%
Questions
Can I replace 225/70R16 with 255/65R16?
255/65R16 is a safe swap for 225/70R16 by the usual ±3% rule: the diameter differs by +2.29%.
What's the difference between 225/70R16 and 255/65R16?
255/65R16 is 0.65" taller and 30 mm wider; the sidewall is +0.32". At an indicated 60 mph you'd actually be doing 61.4 mph.
Will 255/65R16 fit on 225/70R16 wheels?
Both use a 16" rim, so the wheel diameter matches; check the wheel's width range for a 255 mm tire and the fender clearance.