275/35R22 vs 275/40R21
275/40R21 is 2.0 mm taller than 275/35R22 in overall diameter (+0.3%), within the usual 3% limit, so it can replace it where the wheels and clearance allow. With 275/40R21 fitted, the speedometer reads 100 km/h when you are doing 100.3 km/h.
Dimensions side by side
| 275/35R22 | 275/40R21 | |
|---|---|---|
| Overall diameter | 751 mm (29.6″) | 753 mm (29.6″) |
| Section width | 275 mm | 275 mm |
| Sidewall height | 96 mm | 110 mm |
| Rim | 22″ | 21″ |
| Revolutions per km | 424 | 423 |
| In stock | 7 tires from $489.00 | 26 tires from $241.00 |
What changes
- Overall diameter: 275/40R21 is 2.0 mm taller (+0.3%).
- Speedometer: reads 100 km/h at an actual 100.3 km/h with 275/40R21.
- Wheel size changes from 22″ to 21″: 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 275/35R22
Vehicles that use 275/40R21
See every alternate size for 275/35R22
Frequently asked questions
Can I use 275/40R21 instead of 275/35R22?
Usually, yes: 275/40R21 is within 3% of the overall diameter of 275/35R22 (+0.3%). 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 275/35R22 and 275/40R21?
With 275/40R21 instead of 275/35R22, the speedometer shows 100 km/h when you are actually doing 100.3 km/h.
Which vehicles came with both 275/35R22 and 275/40R21?
Both sizes were original equipment, on different trims or packages, on the 2016–2024 Volvo XC90, 2019–2024 BMW X5, 2020–2024 BMW X6, 2022–2024 Mercedes-Benz EQS.