2026 Audi Q3 tire size
Most common factory size
P235/55R18
- Factory sizes
- 1
- Across 1 trim
- Diameter
- 28.18 in
- Revs per mile
- 716
Tire sizes by trim
Source marks: one source
| Size | Trims | Width, mm | Sidewall, % of width | Rim, in | Diameter, in | Sidewall, in | Revs per mile |
|---|---|---|---|---|---|---|---|
| P235/55R18 | S line AWD | 235 | 55 | 18 | 28.18 | 5.09 | 716 |
What P235/55R18 means
| Part | Number | Meaning |
|---|---|---|
| Type | P | Passenger car tire. |
| Width | 235 mm | Tread width. 9.3 in. |
| Sidewall | 55 | Sidewall height is 55% of the width. |
| Construction | R | Radial tire. |
| Rim | 18 in | Fits 18 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 |
|---|---|---|---|---|
| 235/50R19 | 19 | 28.25 | +0.3% | 59.8 mph |
| 235/60R17 | 17 | 28.10 | -0.3% | 60.2 mph |
| 255/50R18 | 18 | 28.04 | -0.5% | 60.3 mph |
| 255/45R19 | 19 | 28.04 | -0.5% | 60.3 mph |
| 215/65R17 | 17 | 28.00 | -0.6% | 60.4 mph |
| 265/45R19 | 19 | 28.39 | +0.8% | 59.6 mph |
| 315/40R18 | 18 | 27.92 | -0.9% | 60.5 mph |
| 225/65R17 | 17 | 28.52 | +1.2% | 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