285/40R19 vs 295/35R20
295/35R20 is a safe swap for 285/40R19 by the usual ±3% rule: the diameter differs by +0.55%.
Speedometer and odometer
With 295/35R20 on a car calibrated for 285/40R19, the speedometer reads 59.7 mph when you're really doing 60, and the odometer under-counts by 0.5%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.2 mph |
| 45 mph | 45.2 mph |
| 60 mph | 60.3 mph |
| 70 mph | 70.4 mph |
| 80 mph | 80.4 mph |
Other sizes close to 285/40R19
- 285/40R19 vs 235/55R19+4.29%
- 285/40R19 vs 235/55R18+0.72%
- 285/40R19 vs 245/45R19-1.06%
- 285/40R19 vs 245/40R19-4.50%
- 285/40R19 vs 255/50R19+3.80%
- 285/40R19 vs 255/40R19-3.38%
- 285/40R19 vs 225/55R18-0.83%
- 285/40R19 vs 245/40R20-0.93%
- 285/40R19 vs 255/45R19+0.21%
- 285/40R19 vs 275/35R19-5.00%
- 285/40R19 vs 225/55R19+2.74%
- 285/40R19 vs 275/40R19-1.13%
Questions
Can I replace 285/40R19 with 295/35R20?
295/35R20 is a safe swap for 285/40R19 by the usual ±3% rule: the diameter differs by +0.55%.
What's the difference between 285/40R19 and 295/35R20?
295/35R20 is 0.15" taller and 10 mm wider; the sidewall is -0.42". At an indicated 60 mph you'd actually be doing 60.3 mph.
Will 295/35R20 fit on 285/40R19 wheels?
No — 285/40R19 needs a 19" wheel and 295/35R20 a 20" wheel. This is a plus/minus-size swap that changes wheels too.