265/40R19 vs 275/45R19
275/45R19 is outside the ±3% rule as a replacement for 265/40R19: the diameter differs by +5.11%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
Speedometer and odometer
With 275/45R19 on a car calibrated for 265/40R19, the speedometer reads 57.1 mph when you're really doing 60, and the odometer under-counts by 5.1%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 31.5 mph |
| 45 mph | 47.3 mph |
| 60 mph | 63.1 mph |
| 70 mph | 73.6 mph |
| 80 mph | 84.1 mph |
Other sizes close to 265/40R19
- 265/40R19 vs 235/50R18-0.35%
- 265/40R19 vs 245/45R19+1.22%
- 265/40R19 vs 245/40R19-2.30%
- 265/40R19 vs 235/40R19-3.46%
- 265/40R19 vs 255/40R19-1.15%
- 265/40R19 vs 255/35R19-4.82%
- 265/40R19 vs 255/45R19+2.52%
- 265/40R19 vs 275/35R19-2.81%
- 265/40R19 vs 275/40R19+1.15%
- 265/40R19 vs 225/40R19-4.61%
- 265/40R19 vs 275/35R20+0.85%
- 265/40R19 vs 225/45R19-1.37%
Questions
Can I replace 265/40R19 with 275/45R19?
275/45R19 is outside the ±3% rule as a replacement for 265/40R19: the diameter differs by +5.11%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
What's the difference between 265/40R19 and 275/45R19?
275/45R19 is 1.40" taller and 10 mm wider; the sidewall is +0.70". At an indicated 60 mph you'd actually be doing 63.1 mph.
Will 275/45R19 fit on 265/40R19 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.