245/45R18 vs 275/35R19
275/35R19 is 3.0 mm shorter than 245/45R18 in overall diameter (−0.4%), within the usual 3% limit, so it can replace it where the wheels and clearance allow. With 275/35R19 fitted, the speedometer reads 100 km/h when you are doing 99.6 km/h.
Dimensions side by side
| 245/45R18 | 275/35R19 | |
|---|---|---|
| Overall diameter | 678 mm (26.7″) | 675 mm (26.6″) |
| Section width | 245 mm | 275 mm |
| Sidewall height | 110 mm | 96 mm |
| Rim | 18″ | 19″ |
| Revolutions per km | 469 | 472 |
| In stock | 50 tires from $118.00 | 21 tires from $138.00 |
What changes
- Overall diameter: 275/35R19 is 3.0 mm shorter (−0.4%).
- Speedometer: reads 100 km/h at an actual 99.6 km/h with 275/35R19.
- 275/35R19 is 30 mm wider, so check clearance and the recommended rim width.
- Wheel size changes from 18″ 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 245/45R18
Vehicles that use 275/35R19
See every alternate size for 245/45R18
Frequently asked questions
Can I use 275/35R19 instead of 245/45R18?
Usually, yes: 275/35R19 is within 3% of the overall diameter of 245/45R18 (−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 245/45R18 and 275/35R19?
With 275/35R19 instead of 245/45R18, the speedometer shows 100 km/h when you are actually doing 99.6 km/h.
Which vehicles came with both 245/45R18 and 275/35R19?
Both sizes were original equipment, on different trims or packages, on the 2024 Mercedes-Benz CLE300, 2017–2023 BMW 530i, 2019–2023 Mercedes-Benz E450, 2020–2022 BMW 840i, 2017–2021 BMW 540i, 2018–2021 BMW 530e.