275/45R21 vs 275/55R19
275/55R19 is 4.0 mm taller than 275/45R21 in overall diameter (+0.5%), within the usual 3% limit, so it can replace it where the wheels and clearance allow. With 275/55R19 fitted, the speedometer reads 100 km/h when you are doing 100.5 km/h.
Dimensions side by side
| 275/45R21 | 275/55R19 | |
|---|---|---|
| Overall diameter | 781 mm (30.7″) | 785 mm (30.9″) |
| Section width | 275 mm | 275 mm |
| Sidewall height | 124 mm | 151 mm |
| Rim | 21″ | 19″ |
| Revolutions per km | 408 | 405 |
| In stock | 30 tires from $216.00 | 4 tires from $172.00 |
What changes
- Overall diameter: 275/55R19 is 4.0 mm taller (+0.5%).
- Speedometer: reads 100 km/h at an actual 100.5 km/h with 275/55R19.
- Wheel size changes from 21″ to 19″: 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 275/55R19
See every alternate size for 275/45R21
Frequently asked questions
Can I use 275/55R19 instead of 275/45R21?
Usually, yes: 275/55R19 is within 3% of the overall diameter of 275/45R21 (+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 275/45R21 and 275/55R19?
With 275/55R19 instead of 275/45R21, the speedometer shows 100 km/h when you are actually doing 100.5 km/h.
Which vehicles came with both 275/45R21 and 275/55R19?
Both sizes were original equipment, on different trims or packages, on the 2020–2024 Mercedes-Benz GLE350, 2020–2024 Mercedes-Benz GLE450, 2024 Mercedes-Benz GLE450e, 2020 Mercedes-Benz GLS450.