2026 Audi S8 tire size
Most common factory size
P265/35R21
- Factory sizes
- 1
- Across 1 trim
- Diameter
- 28.30 in
- Revs per mile
- 713
Tire sizes by trim
Source marks: one source
| Size | Trims | Width, mm | Sidewall, % of width | Rim, in | Diameter, in | Sidewall, in | Revs per mile |
|---|---|---|---|---|---|---|---|
| P265/35R21 | Base Style AWD | 265 | 35 | 21 | 28.30 | 3.65 | 713 |
What P265/35R21 means
| Part | Number | Meaning |
|---|---|---|
| Type | P | Passenger car tire. |
| Width | 265 mm | Tread width. 10.4 in. |
| Sidewall | 35 | Sidewall height is 35% of the width. |
| Construction | R | Radial tire. |
| Rim | 21 in | Fits 21 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 |
|---|---|---|---|---|
| 235/45R20 | 20 | 28.33 | +0.1% | 59.9 mph |
| 265/40R20 | 20 | 28.35 | +0.2% | 59.9 mph |
| 305/35R20 | 20 | 28.41 | +0.4% | 59.8 mph |
| 255/40R20 | 20 | 28.03 | -1.0% | 60.6 mph |
| 275/35R21 | 21 | 28.58 | +1.0% | 59.4 mph |
| 255/35R21 | 21 | 28.03 | -1.0% | 60.6 mph |
| 225/45R20 | 20 | 27.97 | -1.2% | 60.7 mph |
| 275/40R20 | 20 | 28.66 | +1.3% | 59.3 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