Manual: 2013/2014 911

Page: 229

Wheel alignment, wheel balancing
As a precaution, have wheels with summer tires balanced in the spring, and those with mud and snow tires before winter. Unbalanced wheels may affect car handling and tire life.

Only the specified weights may be used for wheel balancing.

Self-adhesive weights must not come into contact with cleaning agents, since they could drop off. Uneven tread wear indicates wheel imbalance. In this event, the vehicle should be checked at an authorized Porsche dealer.

High-Speed tire Vibration

If, during a trip, uneven running or vibrations occur that could be caused by damage to tires or the car, the speed must be reduced immediately, but without braking sharply. If you continue your trip without having the cause of the fault remedied, you might lose control of your vehicle.

  • Stop the vehicle and check the tires.
  • If no cause for the fault can be found, drive carefully to the nearest authorized Porsche dealer.

Wheels with Tire Pressure Monitoring (TPM) sensors
Before changing wheels, make sure that the wheels are compatible with your vehicle's TPM.

  • Check this with your authorized Porsche dealer.

Removing and storing tires

  • After changing, adjust tire pressure and torque wheel bolts diagonally.
    Please see the chapter "CHANGING WHEELS" on page 233.
  • Store tires in a cool and dry place. Rotate periodically to avoid flat spots.
  • Avoid contact with fuel, oil and grease.

Tires must always remain on the same side of the vehicle.
When wheels are removed, the direction of rotation and position of each wheel should be marked.

Example
FR (front right), FL, RR and RL.

Wheels must always be fitted in accordance with their marking.

The perception that tire durability and performance are not affected by storage and age is unfounded.

Chemical additives, which make the rubber elastic, lose their effectiveness over the course of time and the rubber becomes brittle and cracks.

Therefore, the tires should be inspected from time to time.

Information
Under no circumstances should tires older than 6 years be used on your Porsche.

The age of the tire can be obtained from the "DOT" code number. If, for example, the last four numbers read 1211, then the tire was produced in the 12th week of 2011.


Snow tires
The installation of Porsche approved snow tires is recommended.

Use Porsche approved snow tires for grip on snow and ice. Summer performance tires are not suitable for usage in cold, snowy, or icy conditions.

Check with your local Motor Vehicle Bureau for possible restrictions.