195/55R16 vs 245/50R16
245/50R16 is outside the ±3% rule as a replacement for 195/55R16: the diameter differs by +4.91%, 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 195/55R16, the speedometer reads 57.2 mph when you're really doing 60, and the odometer under-counts by 4.9%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 31.5 mph |
| 45 mph | 47.2 mph |
| 60 mph | 62.9 mph |
| 70 mph | 73.4 mph |
| 80 mph | 83.9 mph |
Other sizes close to 195/55R16
- 195/55R16 vs 205/55R16+1.77%
- 195/55R16 vs 215/45R17+0.71%
- 195/55R16 vs 215/55R16+3.54%
- 195/55R16 vs 205/45R17-0.74%
- 195/55R16 vs 185/65R15+0.10%
- 195/55R16 vs 195/60R15-0.95%
- 195/55R16 vs 225/50R16+1.69%
- 195/55R16 vs 205/50R16-1.53%
- 195/55R16 vs 195/50R16-3.14%
- 195/55R16 vs 205/60R15+0.98%
- 195/55R16 vs 185/55R16-1.77%
- 195/55R16 vs 205/45R16-4.83%
Questions
Can I replace 195/55R16 with 245/50R16?
245/50R16 is outside the ±3% rule as a replacement for 195/55R16: the diameter differs by +4.91%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
What's the difference between 195/55R16 and 245/50R16?
245/50R16 is 1.20" taller and 50 mm wider; the sidewall is +0.60". At an indicated 60 mph you'd actually be doing 62.9 mph.
Will 245/50R16 fit on 195/55R16 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.