205/70R16 vs 225/70R16
225/70R16 is outside the ±3% rule as a replacement for 205/70R16: the diameter differs by +4.04%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
Speedometer and odometer
With 225/70R16 on a car calibrated for 205/70R16, 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 205/70R16
- 205/70R16 vs 235/55R17-0.45%
- 205/70R16 vs 215/65R16-1.08%
- 205/70R16 vs 215/60R16-4.18%
- 205/70R16 vs 215/70R16+2.02%
- 205/70R16 vs 215/60R17-0.52%
- 205/70R16 vs 205/65R16-2.96%
- 205/70R16 vs 235/65R16+2.67%
- 205/70R16 vs 225/60R16-2.45%
- 205/70R16 vs 225/65R16+0.79%
- 205/70R16 vs 235/60R16-0.72%
- 205/70R16 vs 225/70R15+0.37%
- 205/70R16 vs 195/75R16+0.79%
Questions
Can I replace 205/70R16 with 225/70R16?
225/70R16 is outside the ±3% rule as a replacement for 205/70R16: the diameter differs by +4.04%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
What's the difference between 205/70R16 and 225/70R16?
225/70R16 is 1.10" taller and 20 mm wider; the sidewall is +0.55". At an indicated 60 mph you'd actually be doing 62.4 mph.
Will 225/70R16 fit on 205/70R16 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.