275/40R20 vs 275/45R19
275/45R19 is 2.0 mm taller than 275/40R20 in overall diameter (+0.3%), within the usual 3% limit, so it can replace it where the wheels and clearance allow. With 275/45R19 fitted, the speedometer reads 100 km/h when you are doing 100.3 km/h.
Dimensions side by side
| 275/40R20 | 275/45R19 | |
|---|---|---|
| Overall diameter | 728 mm (28.7″) | 730 mm (28.7″) |
| Section width | 275 mm | 275 mm |
| Sidewall height | 110 mm | 124 mm |
| Rim | 20″ | 19″ |
| Revolutions per km | 437 | 436 |
| In stock | 39 tires from $143.00 | 5 tires from $271.00 |
What changes
- Overall diameter: 275/45R19 is 2.0 mm taller (+0.3%).
- Speedometer: reads 100 km/h at an actual 100.3 km/h with 275/45R19.
- 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 275/40R20
Vehicles that use 275/45R19
See every alternate size for 275/40R20
Frequently asked questions
Can I use 275/45R19 instead of 275/40R20?
Usually, yes: 275/45R19 is within 3% of the overall diameter of 275/40R20 (+0.3%). 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 275/40R20 and 275/45R19?
With 275/45R19 instead of 275/40R20, the speedometer shows 100 km/h when you are actually doing 100.3 km/h.
Which vehicles came with both 275/40R20 and 275/45R19?
Both sizes were original equipment, on different trims or packages, on the 2014–2019 Bentley Flying Spur, 2014 Bentley Continental, 2003–2006, 2008–2010 Porsche Cayenne, 2010 Volkswagen Touareg.