275/40R20 vs 315/35R20
315/35R20 is 1.0 mm taller than 275/40R20 in overall diameter (+0.1%), within the usual 3% limit, so it can replace it where the wheels and clearance allow. With 315/35R20 fitted, the speedometer reads 100 km/h when you are doing 100.1 km/h.
Dimensions side by side
| 275/40R20 | 315/35R20 | |
|---|---|---|
| Overall diameter | 728 mm (28.7″) | 729 mm (28.7″) |
| Section width | 275 mm | 315 mm |
| Sidewall height | 110 mm | 110 mm |
| Rim | 20″ | 20″ |
| Revolutions per km | 437 | 437 |
| In stock | 39 tires from $143.00 | 18 tires from $180.00 |
What changes
- Overall diameter: 315/35R20 is 1.0 mm taller (+0.1%).
- Speedometer: reads 100 km/h at an actual 100.1 km/h with 315/35R20.
- 315/35R20 is 40 mm wider, so check clearance and the recommended rim width.
- Choose a load index at least as high as the one on your door placard.
Vehicles that came with both sizes
Vehicles that use 275/40R20
Vehicles that use 315/35R20
See every alternate size for 275/40R20
Frequently asked questions
Can I use 315/35R20 instead of 275/40R20?
Usually, yes: 315/35R20 is within 3% of the overall diameter of 275/40R20 (+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 275/40R20 and 315/35R20?
With 315/35R20 instead of 275/40R20, the speedometer shows 100 km/h when you are actually doing 100.1 km/h.
Which vehicles came with both 275/40R20 and 315/35R20?
Both sizes were original equipment, on different trims or packages, on the 2017–2024 Porsche Panamera, 2018–2023 Porsche Panamera Sport Turismo, 2008–2019 BMW X6, 2002–2018 BMW X5, 2010–2012 BMW ActiveHybrid.