The load capacity coefficient (e.g. "91") and maximum speed code letter (e.g. "Y") are minimum requirements.
Can be mounted only on the rear wheels; maximum speed 30 mph (50 km/h).
Use only Porsche authorized fine-link cross-type or edge chains. Snow chain clearance can be guaranteed only on the tire + rim combination marked** without spacers.
Please see the chapter "SPACERS 911 CARRERA, 911 CARRERA S" on page 220.
Tire and rim sizes
Extensive tests are performed before specific tires and wheels are approved by Porsche. Your Porsche dealer has information about approved tires and wheels and is happy to assist you.
If aftermarket tires and/or wheels are installed which are not approved by Porsche, the vehicle's driveability, stability while in motion and handling characteristics might be impaired. Since Porsche has no data on such combinations, Porsche cannot stand behind the safety or durability of these aftermarket combinations.