245/55R19 vs 255/60R19
255/60R19 is outside the ±3% rule as a replacement for 245/55R19: the diameter differs by +4.85%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
Speedometer and odometer
With 255/60R19 on a car calibrated for 245/55R19, 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 245/55R19
- 245/55R19 vs 235/55R19-1.46%
- 245/55R19 vs 255/50R19-1.93%
- 245/55R19 vs 245/60R18-0.12%
- 245/55R19 vs 245/50R20+0.12%
- 245/55R19 vs 275/45R20+0.45%
- 245/55R19 vs 225/55R19-2.93%
- 245/55R19 vs 235/50R19-4.59%
- 245/55R19 vs 255/55R19+1.46%
- 245/55R19 vs 265/45R20-0.74%
- 245/55R19 vs 265/50R19-0.60%
- 245/55R19 vs 245/50R19-3.26%
- 245/55R19 vs 275/55R19+4.39%
Questions
Can I replace 245/55R19 with 255/60R19?
255/60R19 is outside the ±3% rule as a replacement for 245/55R19: the diameter differs by +4.85%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
What's the difference between 245/55R19 and 255/60R19?
255/60R19 is 1.44" taller and 10 mm wider; the sidewall is +0.72". At an indicated 60 mph you'd actually be doing 62.9 mph.
Will 255/60R19 fit on 245/55R19 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.