255/65R16 vs 225/75R16
225/75R16 is a safe swap for 255/65R16 by the usual ±3% rule: the diameter differs by +0.81%.
Speedometer and odometer
With 225/75R16 on a car calibrated for 255/65R16, the speedometer reads 59.5 mph when you're really doing 60, and the odometer under-counts by 0.8%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.2 mph |
| 45 mph | 45.4 mph |
| 60 mph | 60.5 mph |
| 70 mph | 70.6 mph |
| 80 mph | 80.7 mph |
Other sizes close to 255/65R16
- 255/65R16 vs 235/65R17-0.08%
- 255/65R16 vs 245/75R16+4.88%
- 255/65R16 vs 235/70R16-0.34%
- 255/65R16 vs 215/70R16-4.13%
- 255/65R16 vs 235/65R16-3.52%
- 255/65R16 vs 235/75R15-0.60%
- 255/65R16 vs 245/70R16+1.56%
- 255/65R16 vs 225/70R16-2.24%
- 255/65R16 vs 255/70R16+3.46%
- 255/65R16 vs 215/85R16+4.61%
- 255/65R16 vs 235/75R16+2.85%
- 255/65R16 vs 255/60R17-0.01%
Questions
Can I replace 255/65R16 with 225/75R16?
225/75R16 is a safe swap for 255/65R16 by the usual ±3% rule: the diameter differs by +0.81%.
What's the difference between 255/65R16 and 225/75R16?
225/75R16 is 0.24" taller and 30 mm narrower; the sidewall is +0.12". At an indicated 60 mph you'd actually be doing 60.5 mph.
Will 225/75R16 fit on 255/65R16 wheels?
Both use a 16" rim, so the wheel diameter matches; check the wheel's width range for a 225 mm tire and the fender clearance.