255/55R19 vs 275/55R19
275/55R19 is a safe swap for 255/55R19 by the usual ±3% rule: the diameter differs by +2.88%.
Speedometer and odometer
With 275/55R19 on a car calibrated for 255/55R19, the speedometer reads 58.3 mph when you're really doing 60, and the odometer under-counts by 2.9%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.9 mph |
| 45 mph | 46.3 mph |
| 60 mph | 61.7 mph |
| 70 mph | 72.0 mph |
| 80 mph | 82.3 mph |
Other sizes close to 255/55R19
- 255/55R19 vs 235/55R19-2.88%
- 255/55R19 vs 255/50R19-3.34%
- 255/55R19 vs 255/50R20-0.01%
- 255/55R19 vs 235/65R18-0.05%
- 255/55R19 vs 275/45R20-1.00%
- 255/55R19 vs 225/55R19-4.32%
- 255/55R19 vs 235/55R20+0.45%
- 255/55R19 vs 245/55R19-1.44%
- 255/55R19 vs 255/60R19+3.34%
- 255/55R19 vs 265/50R19-2.03%
- 255/55R19 vs 245/50R19-4.65%
- 255/55R19 vs 255/60R18+0.01%
Questions
Can I replace 255/55R19 with 275/55R19?
275/55R19 is a safe swap for 255/55R19 by the usual ±3% rule: the diameter differs by +2.88%.
What's the difference between 255/55R19 and 275/55R19?
275/55R19 is 0.87" taller and 20 mm wider; the sidewall is +0.43". At an indicated 60 mph you'd actually be doing 61.7 mph.
Will 275/55R19 fit on 255/55R19 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.