265/35R19 vs 255/40R19
255/40R19 is a safe swap for 265/35R19 by the usual ±3% rule: the diameter differs by +2.77%.
Speedometer and odometer
With 255/40R19 on a car calibrated for 265/35R19, the speedometer reads 58.4 mph when you're really doing 60, and the odometer under-counts by 2.8%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.8 mph |
| 45 mph | 46.2 mph |
| 60 mph | 61.7 mph |
| 70 mph | 71.9 mph |
| 80 mph | 82.2 mph |
Other sizes close to 265/35R19
- 265/35R19 vs 235/45R18+0.09%
- 265/35R19 vs 245/40R19+1.57%
- 265/35R19 vs 235/40R19+0.37%
- 265/35R19 vs 255/35R19-1.05%
- 265/35R19 vs 275/35R19+1.05%
- 265/35R19 vs 245/35R19-2.10%
- 265/35R19 vs 225/40R19-0.82%
- 265/35R19 vs 235/35R19-3.14%
- 265/35R19 vs 225/45R19+2.54%
- 265/35R19 vs 285/35R19+2.10%
- 265/35R19 vs 235/45R19+3.89%
- 265/35R19 vs 275/30R20+0.73%
Questions
Can I replace 265/35R19 with 255/40R19?
255/40R19 is a safe swap for 265/35R19 by the usual ±3% rule: the diameter differs by +2.77%.
What's the difference between 265/35R19 and 255/40R19?
255/40R19 is 0.73" taller and 10 mm narrower; the sidewall is +0.36". At an indicated 60 mph you'd actually be doing 61.7 mph.
Will 255/40R19 fit on 265/35R19 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.