2025 Porsche 911 tire size
Most common factory size
P245/35R20
- Factory sizes
- 4
- Across 12 trims
- Trims with it
- 5 of 12
- Trims with no size
- 20
- Diameter
- 26.75 in
- Revs per mile
- 754
Tire sizes by trim
Source marks: one source
| Size | Trims | Width, mm | Sidewall, % of width | Rim, in | Diameter, in | Sidewall, in | Revs per mile |
|---|---|---|---|---|---|---|---|
| P245/35R20 | Carrera T RWD, Carrera S RWD, Carrera GTS RWD, Carrera 4 GTS AWD, Targa 4 GTS AWD | 245 | 35 | 20 | 26.75 | 3.38 | 754 |
| P255/35R20 | Turbo AWD, GT3 RWD, GT3 w/Touring Pkg RWD, Turbo S AWD, Turbo 50 Years AWD | 255 | 35 | 20 | 27.03 | 3.51 | 746 |
| P235/40R19 | Carrera RWD | 235 | 40 | 19 | 26.40 | 3.70 | 764 |
| P275/30R20 | GT3 RS RWD | 275 | 30 | 20 | 26.50 | 3.25 | 761 |
What P245/35R20 means
| Part | Number | Meaning |
|---|---|---|
| Type | P | Passenger car tire. |
| Width | 245 mm | Tread width. 9.6 in. |
| Sidewall | 35 | Sidewall height is 35% 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 |
|---|---|---|---|---|
| 285/30R20 | 20 | 26.73 | -0.1% | 60.0 mph |
| 245/40R19 | 19 | 26.72 | -0.1% | 60.1 mph |
| 195/50R19 | 19 | 26.68 | -0.3% | 60.2 mph |
| 275/35R19 | 19 | 26.58 | -0.6% | 60.4 mph |
| 225/45R19 | 19 | 26.97 | +0.8% | 59.5 mph |
| 275/30R20 | 20 | 26.50 | -1.0% | 60.6 mph |
| 235/35R20 | 20 | 26.48 | -1.0% | 60.6 mph |
| 255/35R20 | 20 | 27.03 | +1.0% | 59.4 mph |
| Size | Rim, in | Diameter, in | Change | Speedo reads at 60 mph |
|---|---|---|---|---|
| 255/40R19 | 19 | 27.03 | +0.0% | 60.0 mph |
| 225/45R19 | 19 | 26.97 | -0.2% | 60.1 mph |
| 295/35R19 | 19 | 27.13 | +0.4% | 59.8 mph |
| 305/30R20 | 20 | 27.20 | +0.7% | 59.6 mph |
| 245/35R20 | 20 | 26.75 | -1.0% | 60.6 mph |
| 265/35R20 | 20 | 27.30 | +1.0% | 59.4 mph |
| 285/30R20 | 20 | 26.73 | -1.1% | 60.7 mph |
| 235/45R19 | 19 | 27.33 | +1.1% | 59.3 mph |
| Size | Rim, in | Diameter, in | Change | Speedo reads at 60 mph |
|---|---|---|---|---|
| 215/50R18 | 18 | 26.46 | +0.2% | 59.9 mph |
| 235/35R20 | 20 | 26.48 | +0.3% | 59.8 mph |
| 235/45R18 | 18 | 26.33 | -0.3% | 60.2 mph |
| 275/30R20 | 20 | 26.50 | +0.4% | 59.8 mph |
| 265/35R19 | 19 | 26.30 | -0.4% | 60.2 mph |
| 265/30R20 | 20 | 26.26 | -0.5% | 60.3 mph |
| 275/35R19 | 19 | 26.58 | +0.7% | 59.6 mph |
| 305/30R19 | 19 | 26.20 | -0.7% | 60.5 mph |
| Size | Rim, in | Diameter, in | Change | Speedo reads at 60 mph |
|---|---|---|---|---|
| 235/35R20 | 20 | 26.48 | -0.1% | 60.0 mph |
| 275/35R19 | 19 | 26.58 | +0.3% | 59.8 mph |
| 235/40R19 | 19 | 26.40 | -0.4% | 60.2 mph |
| 195/50R19 | 19 | 26.68 | +0.7% | 59.6 mph |
| 265/35R19 | 19 | 26.30 | -0.7% | 60.4 mph |
| 245/40R19 | 19 | 26.72 | +0.8% | 59.5 mph |
| 265/30R20 | 20 | 26.26 | -0.9% | 60.5 mph |
| 285/30R20 | 20 | 26.73 | +0.9% | 59.5 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