255/55R20 vs 275/40R22
275/40R22 is 10.0 mm shorter than 255/55R20 in overall diameter (−1.3%), within the usual 3% limit, so it can replace it where the wheels and clearance allow. With 275/40R22 fitted, the speedometer reads 100 km/h when you are doing 98.7 km/h.
Dimensions side by side
| 255/55R20 | 275/40R22 | |
|---|---|---|
| Overall diameter | 789 mm (31.1″) | 779 mm (30.7″) |
| Section width | 255 mm | 275 mm |
| Sidewall height | 140 mm | 110 mm |
| Rim | 20″ | 22″ |
| Revolutions per km | 403 | 409 |
| In stock | 37 tires from $175.00 | 29 tires from $325.00 |
What changes
- Overall diameter: 275/40R22 is 10.0 mm shorter (−1.3%).
- Speedometer: reads 100 km/h at an actual 98.7 km/h with 275/40R22.
- 275/40R22 is 20 mm wider, so check clearance and the recommended rim width.
- Wheel size changes from 20″ to 22″: 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 255/55R20
Vehicles that use 275/40R22
See every alternate size for 255/55R20
Frequently asked questions
Can I use 275/40R22 instead of 255/55R20?
Usually, yes: 275/40R22 is within 3% of the overall diameter of 255/55R20 (−1.3%). 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 255/55R20 and 275/40R22?
With 275/40R22 instead of 255/55R20, the speedometer shows 100 km/h when you are actually doing 98.7 km/h.
Which vehicles came with both 255/55R20 and 275/40R22?
Both sizes were original equipment, on different trims or packages, on the 2020–2024 Lincoln Aviator, 2014–2022 Land Rover Range Rover Sport, 2013–2022 Land Rover Range Rover.