2025 Audi SQ8 e-tron Sportback tire size
Most common factory size
P255/50R20
- Factory sizes
- 1
- Across 2 trims
- Trims with no size
- 4
- Diameter
- 30.04 in
- Revs per mile
- 671
Tire sizes by trim
Source marks: one source
| Size | Trims | Width, mm | Sidewall, % of width | Rim, in | Diameter, in | Sidewall, in | Revs per mile |
|---|---|---|---|---|---|---|---|
| P255/50R20 | All 2 trims | 255 | 50 | 20 | 30.04 | 5.02 | 671 |
What P255/50R20 means
| Part | Number | Meaning |
|---|---|---|
| Type | P | Passenger car tire. |
| Width | 255 mm | Tread width. 10.0 in. |
| Sidewall | 50 | Sidewall height is 50% of the width. |
| Construction | R | Radial tire. |
| Rim | 20 in | Fits 20 in wheels. |
Other sizes that fit
Within 3% of the stock diameter. A common shop guideline, not a maker spec.
| Size | Rim, in | Diameter, in | Change | Speedo reads at 60 mph |
|---|---|---|---|---|
| 255/45R21 | 21 | 30.04 | -0.0% | 60.0 mph |
| 255/55R19 | 19 | 30.04 | +0.0% | 60.0 mph |
| 285/45R20 | 20 | 30.10 | +0.2% | 59.9 mph |
| 235/60R19 | 19 | 30.10 | +0.2% | 59.9 mph |
| 285/40R21 | 21 | 29.98 | -0.2% | 60.1 mph |
| 235/55R20 | 20 | 30.18 | +0.5% | 59.7 mph |
| 275/50R19 | 19 | 29.83 | -0.7% | 60.4 mph |
| 235/50R21 | 21 | 30.25 | +0.7% | 59.6 mph |
Checked against 292 factory sizes listed for 2009-2027 US models.
What this cannot tell you
Tire pressure is on the driver door sticker. Not in this data.
Optional wheel packages may differ.
- Two or more sources agree
- One source
- Model-level or estimate
- Sources differ