335/25R20 vs 245/40R19
245/40R19 is a safe swap for 335/25R20 by the usual ±3% rule: the diameter differs by +0.46%.
Speedometer and odometer
With 245/40R19 on a car calibrated for 335/25R20, 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 | 30.1 mph |
| 45 mph | 45.2 mph |
| 60 mph | 60.3 mph |
| 70 mph | 70.3 mph |
| 80 mph | 80.4 mph |
Other sizes close to 335/25R20
- 335/25R20 vs 235/40R19-0.73%
- 335/25R20 vs 245/40R20+4.22%
- 335/25R20 vs 275/35R19-0.06%
- 335/25R20 vs 245/35R20+0.59%
- 335/25R20 vs 255/35R20+1.63%
- 335/25R20 vs 275/35R20+3.70%
- 335/25R20 vs 285/35R19+0.98%
- 335/25R20 vs 285/35R20+4.74%
- 335/25R20 vs 285/30R20+0.52%
- 335/25R20 vs 275/30R20-0.37%
- 335/25R20 vs 265/35R20+2.66%
- 335/25R20 vs 235/35R20-0.44%
Questions
Can I replace 335/25R20 with 245/40R19?
245/40R19 is a safe swap for 335/25R20 by the usual ±3% rule: the diameter differs by +0.46%.
What's the difference between 335/25R20 and 245/40R19?
245/40R19 is 0.12" taller and 90 mm narrower; the sidewall is +0.56". At an indicated 60 mph you'd actually be doing 60.3 mph.
Will 245/40R19 fit on 335/25R20 wheels?
No — 335/25R20 needs a 20" wheel and 245/40R19 a 19" wheel. This is a plus/minus-size swap that changes wheels too.