Improper Tire Size
Installation of sizes not authorized by Porsche may impair driving stability and could result in loss of control of the vehicle.
Tire Pressures for cold tires (68 °F / 20 °C)
These tire filling pressures apply only to the tire makes and types approved by Porsche.
Please see the chapter "TIRES/WHEELS" on page 203. Please see the chapter "TPM TIRE PRESSURE MONITORING" on page 123.