255/40R19 vs 275/35R20
275/35R20 is 14.0 mm taller than 255/40R19 in overall diameter (+2.0%), within the usual 3% limit, so it can replace it where the wheels and clearance allow. With 275/35R20 fitted, the speedometer reads 100 km/h when you are doing 102.0 km/h.
Dimensions side by side
| 255/40R19 | 275/35R20 | |
|---|---|---|
| Overall diameter | 687 mm (27.0″) | 701 mm (27.6″) |
| Section width | 255 mm | 275 mm |
| Sidewall height | 102 mm | 96 mm |
| Rim | 19″ | 20″ |
| Revolutions per km | 463 | 454 |
| In stock | 35 tires from $154.00 | 19 tires from $191.00 |
What changes
- Overall diameter: 275/35R20 is 14.0 mm taller (+2.0%).
- Speedometer: reads 100 km/h at an actual 102.0 km/h with 275/35R20.
- 275/35R20 is 20 mm wider, so check clearance and the recommended rim width.
- Wheel size changes from 19″ to 20″: 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 255/40R19
Vehicles that use 275/35R20
See every alternate size for 255/40R19
Frequently asked questions
Can I use 275/35R20 instead of 255/40R19?
Usually, yes: 275/35R20 is within 3% of the overall diameter of 255/40R19 (+2.0%). 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 255/40R19 and 275/35R20?
With 275/35R20 instead of 255/40R19, the speedometer shows 100 km/h when you are actually doing 102.0 km/h.
Which vehicles came with both 255/40R19 and 275/35R20?
Both sizes were original equipment, on different trims or packages, on the 2010–2014 Mercedes-Benz CL600, 2010–2013 Mercedes-Benz S550, 2010–2013 Mercedes-Benz S400, 2010–2013 Mercedes-Benz S63, 2012–2013 Mercedes-Benz S350, 2013 Mercedes-Benz S600.