285/45R22 vs 325/40R22
325/40R22 is 4.0 mm taller than 285/45R22 in overall diameter (+0.5%), within the usual 3% limit, so it can replace it where the wheels and clearance allow. With 325/40R22 fitted, the speedometer reads 100 km/h when you are doing 100.5 km/h.
Dimensions side by side
| 285/45R22 | 325/40R22 | |
|---|---|---|
| Overall diameter | 815 mm (32.1″) | 819 mm (32.2″) |
| Section width | 285 mm | 325 mm |
| Sidewall height | 128 mm | 130 mm |
| Rim | 22″ | 22″ |
| Revolutions per km | 391 | 389 |
| In stock | 50 tires from $194.00 | 2 tires from $681.00 |
What changes
- Overall diameter: 325/40R22 is 4.0 mm taller (+0.5%).
- Speedometer: reads 100 km/h at an actual 100.5 km/h with 325/40R22.
- 325/40R22 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 285/45R22
Vehicles that use 325/40R22
See every alternate size for 285/45R22
Frequently asked questions
Can I use 325/40R22 instead of 285/45R22?
Usually, yes: 325/40R22 is within 3% of the overall diameter of 285/45R22 (+0.5%). 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 285/45R22 and 325/40R22?
With 325/40R22 instead of 285/45R22, the speedometer shows 100 km/h when you are actually doing 100.5 km/h.
Which vehicles came with both 285/45R22 and 325/40R22?
Both sizes were original equipment, on different trims or packages, on the 2020–2024 Mercedes-Benz GLS450, 2020–2024 Mercedes-Benz GLS580, 2021–2024 Mercedes-Benz GLS63.