245/50R19 vs 255/50R19
255/50R19 is a safe swap for 245/50R19 by the usual ±3% rule: the diameter differs by +1.37%.
Speedometer and odometer
With 255/50R19 on a car calibrated for 245/50R19, the speedometer reads 59.2 mph when you're really doing 60, and the odometer under-counts by 1.4%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.4 mph |
| 45 mph | 45.6 mph |
| 60 mph | 60.8 mph |
| 70 mph | 71.0 mph |
| 80 mph | 81.1 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 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%
- 245/50R19 vs 235/45R19-4.60%
Questions
Can I replace 245/50R19 with 255/50R19?
255/50R19 is a safe swap for 245/50R19 by the usual ±3% rule: the diameter differs by +1.37%.
What's the difference between 245/50R19 and 255/50R19?
255/50R19 is 0.39" taller and 10 mm wider; the sidewall is +0.20". At an indicated 60 mph you'd actually be doing 60.8 mph.
Will 255/50R19 fit on 245/50R19 wheels?
Both use a 19" rim, so the wheel diameter matches; check the wheel's width range for a 255 mm tire and the fender clearance.