265/50R20 vs 275/45R21
275/45R21 is 8.0 mm taller than 265/50R20 in overall diameter (+1.0%), within the usual 3% limit, so it can replace it where the wheels and clearance allow. With 275/45R21 fitted, the speedometer reads 100 km/h when you are doing 101.0 km/h.
Dimensions side by side
| 265/50R20 | 275/45R21 | |
|---|---|---|
| Overall diameter | 773 mm (30.4″) | 781 mm (30.7″) |
| Section width | 265 mm | 275 mm |
| Sidewall height | 133 mm | 124 mm |
| Rim | 20″ | 21″ |
| Revolutions per km | 412 | 408 |
| In stock | 33 tires from $192.00 | 30 tires from $216.00 |
What changes
- Overall diameter: 275/45R21 is 8.0 mm taller (+1.0%).
- Speedometer: reads 100 km/h at an actual 101.0 km/h with 275/45R21.
- 275/45R21 is 10 mm wider, so check clearance and the recommended rim width.
- Wheel size changes from 20″ 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 265/50R20
Vehicles that use 275/45R21
See every alternate size for 265/50R20
Frequently asked questions
Can I use 275/45R21 instead of 265/50R20?
Usually, yes: 275/45R21 is within 3% of the overall diameter of 265/50R20 (+1.0%). 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 265/50R20 and 275/45R21?
With 275/45R21 instead of 265/50R20, the speedometer shows 100 km/h when you are actually doing 101.0 km/h.
Which vehicles came with both 265/50R20 and 275/45R21?
Both sizes were original equipment, on different trims or packages, on the 2023–2024 Mercedes-Benz EQS450, 2023–2024 Jeep Grand Cherokee 4xe, 2024 Jeep Grand Cherokee, 2023 Jeep Grand Cherokee L.