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Parking at the curb<br />
Warning!<br />
Hard impacts against curbs (or traffic<br />
islands) are dangerous and may cause hidden<br />
tire damage which is not noticeable until<br />
later. Such damage can result in accidents at<br />
high speeds causing serious personal injury<br />
or death.<br />
Depending on the force of impact, the edge<br />
of the rim can also be damaged.<br />
f If you are in doubt, have the wheel checked by<br />
an expert, particularly if you suspect damage<br />
on the inside.<br />
f If you must drive over a curb or other obstacle,<br />
drive slowly and at an obtuse angle. Exercise<br />
care when parking along curbs.<br />
Wheel alignment, wheel balancing<br />
As a precaution, have wheels with summer tires<br />
balanced in the spring, and those with mud and<br />
snow tires before winter.<br />
Unbalanced wheels may affect car handling and<br />
tire life.<br />
Only the specified weights may be used for wheel<br />
balancing.<br />
Self-adhesive weights must not come into contact<br />
with cleaning agents, since they could drop off.<br />
Uneven tread wear indicates wheel imbalance. In<br />
this event, the vehicle should be checked at an authorized<br />
Porsche dealer.<br />
Warning!<br />
If, during a trip, uneven running or vibrations<br />
occur that could be caused by damage to<br />
tires or the car, the speed must be reduced<br />
immediately, but without braking sharply.<br />
If you continue your trip without having the<br />
cause of the fault remedied, you might lose<br />
control of your vehicle which could cause serious<br />
personal injury or death.<br />
f Stop the vehicle and check the tires.<br />
f If no cause for the fault can be found, drive<br />
carefully to the nearest authorized Porsche<br />
dealer.<br />
Wheels with Tire Pressure Monitoring<br />
(TPM) sensors<br />
Before changing wheels, make sure that the<br />
wheels are compatible with your vehicle's TPM.<br />
f Check this with your authorized Porsche<br />
dealer.<br />
Removing and storing tires<br />
f After changing, adjust tire pressure and torque<br />
wheel bolts diagonally to 94 ftlb (130 Nm).<br />
Tires must always remain on the same side of<br />
the vehicle.<br />
When wheels are removed, the direction of<br />
rotation and position of each wheel should be<br />
marked.<br />
Example<br />
FR (front right), FL, RR and RL.<br />
Wheels must always be fitted in accordance with<br />
their marking.<br />
The perception that tire durability and performance<br />
are immune to the effects of storage and<br />
age is unfounded.<br />
Chemical additives, which make the rubber elastic,<br />
lose their effectiveness in the course of time<br />
and the rubber becomes brittle and cracks.<br />
Therefore, the tires should be inspected from<br />
time to time.<br />
Practical Tips, Emergency Service 219
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