Manual: 2011/2012 911

Page: 4

– The driver's skill level must be commensurate with the vehicle performance levels in the upper range limits, due to
increased safety risks in the upper range limits.

  • At oudside temperatures below 45 °F (7 °C) change to snow tires.
  • Notify anyone using your car of these characteristics and possible effects.

Loss of Road Surface Contact, Control over the Vehicle and Braking Ability

The reduced tire tread depth means that there is an increased risk of aquaplaning on wet roads.

  • When driving on wet or mud-covered roads reduce speed significantly.

Worn Tires

Sport tires have a smaller tread depth, and thus can reach their wear limit sooner.

It is important to check tire wear frequently to avoid risk of serious personal injury or death from worn tires.

  • Check tire wear frequently.

Driving on Race Circuits (e.g. Sports Driving School, Club Sport Events)
Brake fluid, brake pads and brake discs
Brake fluid absorbs moisture from the air over time. This accumulation of water lowers the boiling point and can impair braking action if the brakes are subjected to high temperatures, such as can occur on race circuits (sports driving school, Club Sport events).

The brake fluid should therefore not be more than 12 months old if the vehicle is driven on race circuits (sports driving school, Club Sport events).

  • For more information, see the " Maintenance" booklet.

Wear on the brake pads and brake discs depends to a great extent on the driving style and driving conditions. Wear on the brake components is increased as a result of high temperatures, such as can occur on race circuits (sports driving school, Club Sport events).

Before driving on race circuits (sports driving school, Club Sport events), it is important therefore to carry out a visual inspection of the brake pads and brake discs for wear.

Racing tires
The fitting of racing tires (e.g. slicks) for sporting events is not approved by Porsche.

Very high cornering speeds can be achieved with racing tires. The resulting lateral acceleration values would jeopardise the adequate supply of oil to the engine.

Porsche therefore refuses to accept any guarantee or liability for damage occurring as a result of non-compliance with this provision.

Porsche Ceramic Composite Brake (PCCB)

  • Please see the chapter "BRAKES" on page 48.

The high-performance brake system is designed for optimal braking effect at all speeds and temperatures.

Certain speeds, braking forces and ambient conditions (such as temperature and humidity) therefore might cause brake noises.

Wear on the different components and braking system, such as brake pads and brake discs, depends to a great extent on the individual driving style and the conditions of use and therefore cannot be expressed in actual miles on the road.

The values communicated by Porsche are based on normal operation adapted to traffic. Wear increases considerably when the vehicle is driven on race tracks or through an aggressive driving style.

  • Please consult an authorized Porsche dealer about the current guidelines in effect before such use of your vehicle.