205/55R16 vs 245/50R16
245/50R16 is outside the ±3% rule as a replacement for 205/55R16: the diameter differs by +3.09%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
Speedometer and odometer
With 245/50R16 on a car calibrated for 205/55R16, the speedometer reads 58.2 mph when you're really doing 60, and the odometer under-counts by 3.1%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.9 mph |
| 45 mph | 46.4 mph |
| 60 mph | 61.9 mph |
| 70 mph | 72.2 mph |
| 80 mph | 82.5 mph |
Other sizes close to 205/55R16
- 205/55R16 vs 225/45R17+0.38%
- 205/55R16 vs 205/50R17+0.78%
- 205/55R16 vs 215/55R16+1.74%
- 205/55R16 vs 205/60R16+3.24%
- 205/55R16 vs 195/65R15+0.41%
- 205/55R16 vs 245/40R17-0.65%
- 205/55R16 vs 255/40R17+0.62%
- 205/55R16 vs 195/55R16-1.74%
- 205/55R16 vs 225/50R16-0.08%
- 205/55R16 vs 205/50R16-3.24%
- 205/55R16 vs 225/55R16+3.48%
- 205/55R16 vs 195/50R16-4.83%
Questions
Can I replace 205/55R16 with 245/50R16?
245/50R16 is outside the ±3% rule as a replacement for 205/55R16: the diameter differs by +3.09%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
What's the difference between 205/55R16 and 245/50R16?
245/50R16 is 0.77" taller and 40 mm wider; the sidewall is +0.38". At an indicated 60 mph you'd actually be doing 61.9 mph.
Will 245/50R16 fit on 205/55R16 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.