285/35R19 vs 345/30R19
345/30R19 is a safe swap for 285/35R19 by the usual ±3% rule: the diameter differs by +1.10%.
Speedometer and odometer
With 345/30R19 on a car calibrated for 285/35R19, the speedometer reads 59.3 mph when you're really doing 60, and the odometer under-counts by 1.1%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.3 mph |
| 45 mph | 45.5 mph |
| 60 mph | 60.7 mph |
| 70 mph | 70.8 mph |
| 80 mph | 80.9 mph |
Other sizes close to 285/35R19
- 285/35R19 vs 245/45R18-0.65%
- 285/35R19 vs 245/45R19+3.08%
- 285/35R19 vs 245/40R19-0.51%
- 285/35R19 vs 225/50R18+0.01%
- 285/35R19 vs 235/40R19-1.69%
- 285/35R19 vs 255/40R19+0.66%
- 285/35R19 vs 255/35R19-3.08%
- 285/35R19 vs 255/45R19+4.40%
- 285/35R19 vs 275/35R19-1.03%
- 285/35R19 vs 275/40R19+3.01%
- 285/35R19 vs 245/35R20-0.38%
- 285/35R19 vs 245/35R19-4.10%
Questions
Can I replace 285/35R19 with 345/30R19?
345/30R19 is a safe swap for 285/35R19 by the usual ±3% rule: the diameter differs by +1.10%.
What's the difference between 285/35R19 and 345/30R19?
345/30R19 is 0.30" taller and 60 mm wider; the sidewall is +0.15". At an indicated 60 mph you'd actually be doing 60.7 mph.
Will 345/30R19 fit on 285/35R19 wheels?
Both use a 19" rim, so the wheel diameter matches; check the wheel's width range for a 345 mm tire and the fender clearance.