Porsche 968 - Tyres and Tyre Care; Tyre Damage Inspection; Load and Speed Limit Adherence; Kerb Impact Precautions

lyres and lyre Care
'•lt•t•llit•llt•tl rt~<il , ll lyre s are high-quality engin-
"'''"tl pltltlucl s. The service life of your tyres
will tlt•polld 011 your driving style as well as car-
l t!tl t1i1 p1 c ss urc and proper wheel alignment.
liblliPI t~ cc cleration, high cornering speeds and
liotlvy braking increase tyre wear . Tread wear is
al so greater at higher temperatures and on
rough road surfaces. Like the engine, tyres
mu st always operate under the right conditions .
If treated properly they will be a long-lasting
safety element on your Porsche . The following
tips will show you what to do . To protect your-
self and other road users, it is absolutely essen-
tial that you follow these rules .
lyre Pressure
Tyres must be kept at the prescribed pressure,
indicated on page 4 of this Manual and under
the filler flap on the car (Cabriolet: on the inside
of the luggage -compartment lid). This pressure
applies when the tyres are cold, and represents
an absolute minimum. When the tyres warm up
(after driving, for example) the pressure will rise.
Therefore, never let air out of hot tyres: the
pressure might drop below the minimum value .
Tyre pressure must be checked every 14
days . Always check pressures when the
tyres are cold.
Valve cap s protect the valves against dust and
dirt as well as leak s. Alway s screw the caps
down tightly , and replace mis s ing caps immedi -
ately .
Insufficient pressure can cau se the tyre s to
overheat and suffer internal damage . Hidden
tyre damage cannot be reversed by s ub s equent
corrections in air pressure.
Load and Speed
Do not overload your Porsche . Never exceed
specified roof loads and trailer towing loads. A
combination of overloading + low tyre pressures
+ high speed + high outside temperature (on
vacation trips, for example) is extremely danger-
ous.
Kerbs
Drive over kerbs slowly, preferably at a right
angle. Avoid driving over steep or sharp kerbs.
Impacts at high speed or sharp angles against
kerbs or other sharp-edged objects (like stones)
can lead to concealed tyre damage that will not
be noticed until later (risk of tyre failure at high
speeds). Tyres never forget!
lyre Damage
Examine tyres at r.egular intervals for foreign ob-
jects, nicks, cuts, cracks and bulges (in the
sidewalls). If a tyre is damaged and you cannot
absolutely rule out the possibility that a ply has
broken (with all the resulting consequences), or
that the tyre has been thermally and mechan-
ically overloaded due to a loss of pressure or
other da mage, we recommend that the tyre be
replaced for safety reasons. Even invisible dam-
age to a tyre can lead to a blowout at high
speeds. Tyres must never be repaired_
When replacing a defective tyre, note that the
difference in tread depth on the same axle must
be no more than 30%. Never install a used tyre
if you do not know its prior history!
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