255/45R20 vs 255/50R19
255/50R19 is 0.0 mm taller than 255/45R20 in overall diameter (±0.0%), within the usual 3% limit, so it can replace it where the wheels and clearance allow. With 255/50R19 fitted, the speedometer reads 100 km/h when you are doing 100.0 km/h.
Dimensions side by side
| 255/45R20 | 255/50R19 | |
|---|---|---|
| Overall diameter | 738 mm (29.1″) | 738 mm (29.1″) |
| Section width | 255 mm | 255 mm |
| Sidewall height | 115 mm | 128 mm |
| Rim | 20″ | 19″ |
| Revolutions per km | 431 | 431 |
| In stock | 81 tires from $173.00 | 56 tires from $160.00 |
What changes
- Overall diameter: 255/50R19 is 0.0 mm taller (±0.0%).
- Speedometer: reads 100 km/h at an actual 100.0 km/h with 255/50R19.
- Wheel size changes from 20″ 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 255/45R20
Vehicles that use 255/50R19
See every alternate size for 255/45R20
Frequently asked questions
Can I use 255/50R19 instead of 255/45R20?
Usually, yes: 255/50R19 is within 3% of the overall diameter of 255/45R20 (±0.0%). 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 255/45R20 and 255/50R19?
With 255/50R19 instead of 255/45R20, the speedometer shows 100 km/h when you are actually doing 100.0 km/h.
Which vehicles came with both 255/45R20 and 255/50R19?
Both sizes were original equipment, on different trims or packages, on the 2022–2024 Audi Q4 e-tron, 2021–2022, 2024 Volkswagen ID.4, 2024 Maserati Grecale, 2010–2020 Rolls Royce Ghost, 2010–2014 Volvo XC90.