225/70R16 vs 245/70R16
245/70R16 is outside the ±3% rule as a replacement for 225/70R16: the diameter differs by +3.88%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
Speedometer and odometer
With 245/70R16 on a car calibrated for 225/70R16, the speedometer reads 57.8 mph when you're really doing 60, and the odometer under-counts by 3.9%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 31.2 mph |
| 45 mph | 46.7 mph |
| 60 mph | 62.3 mph |
| 70 mph | 72.7 mph |
| 80 mph | 83.1 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 225/65R16-3.12%
- 225/70R16 vs 235/60R16-4.57%
- 225/70R16 vs 255/65R16+2.29%
- 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 245/70R16?
245/70R16 is outside the ±3% rule as a replacement for 225/70R16: the diameter differs by +3.88%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
What's the difference between 225/70R16 and 245/70R16?
245/70R16 is 1.10" taller and 20 mm wider; the sidewall is +0.55". At an indicated 60 mph you'd actually be doing 62.3 mph.
Will 245/70R16 fit on 225/70R16 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.