2025 Audi A5 tire size
Most common factory size
P245/40R18
- Factory sizes
- 3
- Across 9 trims
- Trims with it
- 4 of 9
- Diameter
- 25.72 in
- Revs per mile
- 784
Tire sizes by trim
Source marks: one source
| Size | Trims | Width, mm | Sidewall, % of width | Rim, in | Diameter, in | Sidewall, in | Revs per mile |
|---|---|---|---|---|---|---|---|
| P245/40R18 | Sportback S line 45 TFSI Premium AWD, Sportback 40 TFSI Premium Plus AWD, Sportback 40 TFSI Premium AWD, Sportback 40 TFSI Prestige AWD | 245 | 40 | 18 | 25.72 | 3.86 | 784 |
| 235/45R18 | Premium AWD, Premium Plus AWD, Prestige AWD | 235 | 45 | 18 | 26.33 | 4.16 | 766 |
| P255/35R19 | Sportback S line 45 TFSI Premium Plus AWD, Sportback S line 45 TFSI Prestige AWD | 255 | 35 | 19 | 26.03 | 3.51 | 775 |
What P245/40R18 means
| Part | Number | Meaning |
|---|---|---|
| Type | P | Passenger car tire. |
| Width | 245 mm | Tread width. 9.6 in. |
| Sidewall | 40 | Sidewall height is 40% 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 |
|---|---|---|---|---|
| 285/30R19 | 19 | 25.73 | +0.1% | 60.0 mph |
| 245/35R19 | 19 | 25.75 | +0.1% | 59.9 mph |
| 245/45R17 | 17 | 25.68 | -0.1% | 60.1 mph |
| 215/45R18 | 18 | 25.62 | -0.4% | 60.2 mph |
| 275/35R18 | 18 | 25.58 | -0.5% | 60.3 mph |
| 225/50R17 | 17 | 25.86 | +0.6% | 59.7 mph |
| 205/55R17 | 17 | 25.88 | +0.6% | 59.6 mph |
| 235/35R19 | 19 | 25.48 | -0.9% | 60.6 mph |
| Size | Rim, in | Diameter, in | Change | Speedo reads at 60 mph |
|---|---|---|---|---|
| 215/55R17 | 17 | 26.31 | -0.1% | 60.0 mph |
| 265/35R19 | 19 | 26.30 | -0.1% | 60.1 mph |
| 235/40R19 | 19 | 26.40 | +0.3% | 59.8 mph |
| 235/50R17 | 17 | 26.25 | -0.3% | 60.2 mph |
| 195/60R17 | 17 | 26.21 | -0.4% | 60.3 mph |
| 305/30R19 | 19 | 26.20 | -0.5% | 60.3 mph |
| 215/50R18 | 18 | 26.46 | +0.5% | 59.7 mph |
| 225/40R19 | 19 | 26.09 | -0.9% | 60.6 mph |
| Size | Rim, in | Diameter, in | Change | Speedo reads at 60 mph |
|---|---|---|---|---|
| 255/30R20 | 20 | 26.02 | -0.0% | 60.0 mph |
| 255/40R18 | 18 | 26.03 | +0.0% | 60.0 mph |
| 225/45R18 | 18 | 25.97 | -0.2% | 60.1 mph |
| 225/40R19 | 19 | 26.09 | +0.2% | 59.9 mph |
| 225/35R20 | 20 | 26.20 | +0.7% | 59.6 mph |
| 305/30R19 | 19 | 26.20 | +0.7% | 59.6 mph |
| 265/30R20 | 20 | 26.26 | +0.9% | 59.5 mph |
| 245/30R20 | 20 | 25.79 | -0.9% | 60.6 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