245/55R19 vs 275/55R19
275/55R19 is outside the ±3% rule as a replacement for 245/55R19: the diameter differs by +4.39%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
Speedometer and odometer
With 275/55R19 on a car calibrated for 245/55R19, the speedometer reads 57.5 mph when you're really doing 60, and the odometer under-counts by 4.4%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 31.3 mph |
| 45 mph | 47.0 mph |
| 60 mph | 62.6 mph |
| 70 mph | 73.1 mph |
| 80 mph | 83.5 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 255/60R19+4.85%
- 245/55R19 vs 265/50R19-0.60%
- 245/55R19 vs 245/50R19-3.26%
Questions
Can I replace 245/55R19 with 275/55R19?
275/55R19 is outside the ±3% rule as a replacement for 245/55R19: the diameter differs by +4.39%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
What's the difference between 245/55R19 and 275/55R19?
275/55R19 is 1.30" taller and 30 mm wider; the sidewall is +0.65". At an indicated 60 mph you'd actually be doing 62.6 mph.
Will 275/55R19 fit on 245/55R19 wheels?
Both use a 19" rim, so the wheel diameter matches; check the wheel's width range for a 275 mm tire and the fender clearance.