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270
Minor Repairs
Valves
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Use only plastic valve caps.
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The rubber valves must be replaced whenever
the tires are changed.
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The fitting and replacement specifications
must be observed for metal valves.
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Only use Original Porsche metal valves.
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Protect the valve inserts against soiling with
valve caps. Soiled valve inserts can cause a
gradual loss of air.
Parking at the curb
Hard impacts against curbs (or traffic islands) are
dangerous and may cause hidden tire damage
which is not noticeable until later. Such damage
can result in accidents at high speeds. Depending
on the force of impact, the edge of the rim can
also be damaged.
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After such an impact, have the wheel checked
by an expert.
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If you must drive over a curb or other obstacle,
drive slowly and at an obtuse angle.
Exercise care when parking along curbs.
Information
Tire repairs are not permissible under any
circumstances.
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.
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.
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Stop the vehicle and check the tires.
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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.
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Check this with your authorized Porsche
dealer.
Removing and storing tires
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After changing, adjust tire pressure and torque
wheel bolts diagonally.
Please see the chapter “CHANGING WHEELS”
on page 275.
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Store tires in a cool and dry place.
Rotate
periodically to avoid flat spots.
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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.
Curb Impact / Tire
Damage
DANGER
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High-Speed tire
Vibration
DANGER
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