225/75R16 vs 245/75R16
245/75R16 is outside the ±3% rule as a replacement for 225/75R16: the diameter differs by +4.03%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
Speedometer and odometer
With 245/75R16 on a car calibrated for 225/75R16, the speedometer reads 57.7 mph when you're really doing 60, and the odometer under-counts by 4.0%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 31.2 mph |
| 45 mph | 46.8 mph |
| 60 mph | 62.4 mph |
| 70 mph | 72.8 mph |
| 80 mph | 83.2 mph |
Other sizes close to 225/75R16
- 225/75R16 vs 235/65R17-0.89%
- 225/75R16 vs 245/65R17+0.86%
- 225/75R16 vs 235/70R16-1.14%
- 225/75R16 vs 265/70R16+4.50%
- 225/75R16 vs 215/70R16-4.91%
- 225/75R16 vs 235/65R16-4.30%
- 225/75R16 vs 245/70R16+0.74%
- 225/75R16 vs 225/70R16-3.02%
- 225/75R16 vs 255/70R16+2.62%
- 225/75R16 vs 215/85R16+3.76%
- 225/75R16 vs 235/75R16+2.02%
- 225/75R16 vs 255/65R16-0.81%
Questions
Can I replace 225/75R16 with 245/75R16?
245/75R16 is outside the ±3% rule as a replacement for 225/75R16: the diameter differs by +4.03%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
What's the difference between 225/75R16 and 245/75R16?
245/75R16 is 1.18" taller and 20 mm wider; the sidewall is +0.59". At an indicated 60 mph you'd actually be doing 62.4 mph.
Will 245/75R16 fit on 225/75R16 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.