295/35R19 vs 285/40R19
285/40R19 is outside the ±3% rule as a replacement for 295/35R19: the diameter differs by +3.12%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
Speedometer and odometer
With 285/40R19 on a car calibrated for 295/35R19, the speedometer reads 58.2 mph when you're really doing 60, and the odometer under-counts by 3.1%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.9 mph |
| 45 mph | 46.4 mph |
| 60 mph | 61.9 mph |
| 70 mph | 72.2 mph |
| 80 mph | 82.5 mph |
Other sizes close to 295/35R19
- 295/35R19 vs 235/50R18+0.45%
- 295/35R19 vs 245/45R19+2.03%
- 295/35R19 vs 245/40R19-1.52%
- 295/35R19 vs 235/40R19-2.68%
- 295/35R19 vs 255/40R19-0.36%
- 295/35R19 vs 255/35R19-4.06%
- 295/35R19 vs 255/45R19+3.34%
- 295/35R19 vs 275/35R19-2.03%
- 295/35R19 vs 275/40R19+1.96%
- 295/35R19 vs 255/35R20-0.38%
- 295/35R19 vs 225/40R19-3.85%
- 295/35R19 vs 225/45R19-0.58%
Questions
Can I replace 295/35R19 with 285/40R19?
285/40R19 is outside the ±3% rule as a replacement for 295/35R19: the diameter differs by +3.12%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
What's the difference between 295/35R19 and 285/40R19?
285/40R19 is 0.85" taller and 10 mm narrower; the sidewall is +0.42". At an indicated 60 mph you'd actually be doing 61.9 mph.
Will 285/40R19 fit on 295/35R19 wheels?
Both use a 19" rim, so the wheel diameter matches; check the wheel's width range for a 285 mm tire and the fender clearance.