295/30R19 vs 245/40R19
245/40R19 is a safe swap for 295/30R19 by the usual ±3% rule: the diameter differs by +2.88%.
Speedometer and odometer
With 245/40R19 on a car calibrated for 295/30R19, 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 295/30R19
- 295/30R19 vs 225/45R18+0.02%
- 295/30R19 vs 245/40R18-0.97%
- 295/30R19 vs 235/40R19+1.67%
- 295/30R19 vs 255/40R19+4.09%
- 295/30R19 vs 255/35R19+0.23%
- 295/30R19 vs 255/40R18+0.24%
- 295/30R19 vs 275/35R19+2.35%
- 295/30R19 vs 245/35R19-0.83%
- 295/30R19 vs 225/40R19+0.45%
- 295/30R19 vs 235/35R19-1.90%
- 295/30R19 vs 225/45R19+3.87%
- 295/30R19 vs 285/35R19+3.41%
Questions
Can I replace 295/30R19 with 245/40R19?
245/40R19 is a safe swap for 295/30R19 by the usual ±3% rule: the diameter differs by +2.88%.
What's the difference between 295/30R19 and 245/40R19?
245/40R19 is 0.75" taller and 50 mm narrower; the sidewall is +0.37". At an indicated 60 mph you'd actually be doing 61.7 mph.
Will 245/40R19 fit on 295/30R19 wheels?
Both use a 19" rim, so the wheel diameter matches; check the wheel's width range for a 245 mm tire and the fender clearance.