275/45R21 vs 285/40R22

285/40R22 is 6.0 mm taller than 275/45R21 in overall diameter (+0.8%), within the usual 3% limit, so it can replace it where the wheels and clearance allow. With 285/40R22 fitted, the speedometer reads 100 km/h when you are doing 100.8 km/h.

Dimensions side by side

	275/45R21	285/40R22
Overall diameter	781 mm (30.7″)	787 mm (31.0″)
Section width	275 mm	285 mm
Sidewall height	124 mm	114 mm
Rim	21″	22″
Revolutions per km	408	404
In stock	30 tires from $216.00	18 tires from $399.00

What changes

Overall diameter: 285/40R22 is 6.0 mm taller (+0.8%).
Speedometer: reads 100 km/h at an actual 100.8 km/h with 285/40R22.
285/40R22 is 10 mm wider, so check clearance and the recommended rim width.
Wheel size changes from 21″ 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 275/45R21

Vehicles that use 285/40R22

See every alternate size for 275/45R21

Frequently asked questions

Can I use 285/40R22 instead of 275/45R21?

Usually, yes: 285/40R22 is within 3% of the overall diameter of 275/45R21 (+0.8%). 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 275/45R21 and 285/40R22?

With 285/40R22 instead of 275/45R21, the speedometer shows 100 km/h when you are actually doing 100.8 km/h.

Which vehicles came with both 275/45R21 and 285/40R22?

Both sizes were original equipment, on different trims or packages, on the 2017–2024 Land Rover Discovery, 2017–2024 Mercedes-Benz GLE 63 S, 2020–2024 Mercedes-Benz GLE 53, 2020–2024 Mercedes-Benz GLE450, 2021–2024 Mercedes-Benz GLE53, 2020–2024 Mercedes-Benz GLE580.