Porsche 911 Carrera Manual page 188

Tire pressures
Warning!
Incorrect tire pressure causes increased tire
wear and adversely affects road handling.
f Always use an accurate tire pressure gauge
when checking inflation pressures.
f Do not exceed the maximum tire pressure list-
ed on the tire sidewall.
Please observe the chapter "TIRE PRESSURE
PLATE" on Page 239.
f Cold tire inflation pressure means: all tires
must be cold, ambient temperature maximum
(68°F, (20°C) , when adjusting the inflation pres-
sure.
Avoid sunlight striking the tires before measur-
ing cold pressures, since the pressures would
rise from temperature influence.
f Valve caps protect the valve from dust and dirt,
and thus from leakage.
Always screw caps tightly down.
Replace missing caps immediately.
f Use only plastic valve caps.
f Do not use commercially available sealant or
tire inflating bottles. Only use Porsche
approved tire sealant.
188
Practical Tips, Emergency Service
The tire pressure must match the prescribed val-
ue.
You can find information on tire pressure:
– on Page 3 of this Owner's Manual
– and in the left door aperture.
These values are for cold tires (68°F (20 °C)).
f Check the tire pressure at least every
2 weeks. Always check when tires are cold.
When tires are warm, the tire pressure is
increased.
f Never let air out of hot tires.
This could cause the tire pressure to fall below
the prescribed value.
Insufficient tire filling pressure can cause tires to
overheat and thus be damaged – even invisibly.
Hidden tire damage is not eliminated by subse-
quently correcting the tire pressure.
Overloading
Danger!
Risk of personal injury, loss of control and
damage to vehicle parts.
f Do not overload your vehicle. Be careful about
the roof load.
f If loading the vehicle also correct the tire pres-
sure. Tire pressure for loaded vehicle can be
found on the tire pressure plate and in the
chapter technical data.
f Never exceed the specified axle load.
Overloading can shorten the service life of the
tires and car, as well as lead to dangerous ve-
hicle reactions and long braking distances.
Damage due to overloading is not covered by
the vehicle warranty.
f Please observe the chapter "LOADING INFOR-
MATION" on Page 198.
f Please observe the chapter "TIRE PRESSURES
FOR COLD TIRES" on Page 241.