245/35R20 vs 245/40R19
245/40R19 is 1.0 mm shorter than 245/35R20 in overall diameter (−0.1%), within the usual 3% limit, so it can replace it where the wheels and clearance allow. With 245/40R19 fitted, the speedometer reads 100 km/h when you are doing 99.9 km/h.
Dimensions side by side
| 245/35R20 | 245/40R19 | |
|---|---|---|
| Overall diameter | 680 mm (26.8″) | 679 mm (26.7″) |
| Section width | 245 mm | 245 mm |
| Sidewall height | 86 mm | 98 mm |
| Rim | 20″ | 19″ |
| Revolutions per km | 468 | 469 |
| In stock | 23 tires from $129.00 | 56 tires from $125.00 |
What changes
- Overall diameter: 245/40R19 is 1.0 mm shorter (−0.1%).
- Speedometer: reads 100 km/h at an actual 99.9 km/h with 245/40R19.
- 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 245/35R20
Vehicles that use 245/40R19
See every alternate size for 245/35R20
Frequently asked questions
Can I use 245/40R19 instead of 245/35R20?
Usually, yes: 245/40R19 is within 3% of the overall diameter of 245/35R20 (−0.1%). 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 245/35R20 and 245/40R19?
With 245/40R19 instead of 245/35R20, the speedometer shows 100 km/h when you are actually doing 99.9 km/h.
Which vehicles came with both 245/35R20 and 245/40R19?
Both sizes were original equipment, on different trims or packages, on the 2020–2024 BMW 840i, 2019–2024 BMW M850i, 2019–2024 Volkswagen Arteon, 2022–2024 BMW 430i, 2022–2024 BMW M440i, 2023–2024 Mercedes-Benz C43.