285/35R20 vs 285/40R19
285/40R19 is 3.0 mm taller than 285/35R20 in overall diameter (+0.4%), within the usual 3% limit, so it can replace it where the wheels and clearance allow. With 285/40R19 fitted, the speedometer reads 100 km/h when you are doing 100.4 km/h.
Dimensions side by side
| 285/35R20 | 285/40R19 | |
|---|---|---|
| Overall diameter | 708 mm (27.9″) | 711 mm (28.0″) |
| Section width | 285 mm | 285 mm |
| Sidewall height | 100 mm | 114 mm |
| Rim | 20″ | 19″ |
| Revolutions per km | 450 | 448 |
| In stock | 12 tires from $325.00 | 4 tires from $316.00 |
What changes
- Overall diameter: 285/40R19 is 3.0 mm taller (+0.4%).
- Speedometer: reads 100 km/h at an actual 100.4 km/h with 285/40R19.
- Wheel size changes from 20″ to 19″: you need wheels in the new size.
- Choose a load index at least as high as the one on your door placard.
Vehicles that came with both sizes
Vehicles that use 285/35R20
Vehicles that use 285/40R19
See every alternate size for 285/35R20
Frequently asked questions
Can I use 285/40R19 instead of 285/35R20?
Usually, yes: 285/40R19 is within 3% of the overall diameter of 285/35R20 (+0.4%). Use wheels of the right size and width, match or exceed the original load index, and check clearance at full steering lock.
How much does the speedometer change between 285/35R20 and 285/40R19?
With 285/40R19 instead of 285/35R20, the speedometer shows 100 km/h when you are actually doing 100.4 km/h.
Which vehicles came with both 285/35R20 and 285/40R19?
Both sizes were original equipment, on different trims or packages, on the 2018–2023 BMW M5, 2009–2018 Ferrari California, 2008–2012 Maserati GranTurismo, 2007–2010 Ferrari 612.