2020 Porsche 911 tire size
Most common factory size
P245/35R20
- Factory sizes
- 1
- Across 4 trims
- Trims with no size
- 7
- 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 | All 4 trims | 245 | 35 | 20 | 26.75 | 3.38 | 754 |
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 |
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