245/50R19 vs 285/45R19
285/45R19 is a safe swap for 245/50R19 by the usual ±3% rule: the diameter differs by +1.58%.
Speedometer and odometer
With 285/45R19 on a car calibrated for 245/50R19, the speedometer reads 59.1 mph when you're really doing 60, and the odometer under-counts by 1.6%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.5 mph |
| 45 mph | 45.7 mph |
| 60 mph | 60.9 mph |
| 70 mph | 71.1 mph |
| 80 mph | 81.3 mph |
Other sizes close to 245/50R19
- 245/50R19 vs 235/55R19+1.86%
- 245/50R19 vs 245/45R19-3.37%
- 245/50R19 vs 225/60R18-0.05%
- 245/50R19 vs 245/45R20+0.12%
- 245/50R19 vs 255/50R19+1.37%
- 245/50R19 vs 275/40R20+0.05%
- 245/50R19 vs 255/45R19-2.13%
- 245/50R19 vs 225/55R19+0.34%
- 245/50R19 vs 275/40R19-3.44%
- 245/50R19 vs 235/50R19-1.37%
- 245/50R19 vs 245/55R19+3.37%
- 245/50R19 vs 255/55R19+4.88%
Questions
Can I replace 245/50R19 with 285/45R19?
285/45R19 is a safe swap for 245/50R19 by the usual ±3% rule: the diameter differs by +1.58%.
What's the difference between 245/50R19 and 285/45R19?
285/45R19 is 0.45" taller and 40 mm wider; the sidewall is +0.23". At an indicated 60 mph you'd actually be doing 60.9 mph.
Will 285/45R19 fit on 245/50R19 wheels?
Both use a 19" rim, so the wheel diameter matches; check the wheel's width range for a 285 mm tire and the fender clearance.