Sport Tires; Driving On Race Circuit; Schools, Club Sport Events) - Porsche cayman gt4 Owner's Manual

Sport tires

Your vehicle is equipped with special sport tires
(ultra high performance tires). This type of tire is
approved for use on public highways and comply
with all statutory requirements and safety criteria.
The design of the tire is also geared towards use
on racing circuits (driver safety training courses,
sports driving schools, Club Sport events) and
provides distinct advantages here in terms of dry
grip and wear compared to conventional road
tires.
The major features are a reduced tread depth and
a special tread pattern and carcass.
The design features of this sports tire result
in the following effects compared with other
summer tires when used under normal
driving conditions:
– Sport tires have a smaller tread depth, and
thus can reach their wear limit sooner.
As with all tires, the attainable mileage
depends on the individual driving style and the
conditions of use.
– Exercise caution when driving on wet roads,
paying special attention to hydroplaning
situations (stagnant water, puddles, lane
grooves). Sport tires have a lower tread depth
than normal tires and you must therefore adapt
speed accordingly when driving on wet
surfaces.
– The driver's skill level must be commensurate
with the vehicle performance levels in the
upper range limits, due to increased safety
risks in the upper range limits.
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Sport tires are not suitable for use in cold,
snowy, or icy conditions. At outside
temperatures below 45 °F (7 °C) change to
snow tires.
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Notify anyone using your car of these
characteristics and possible effects.
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Loss of Road Surface
DANGER
Contact, Control over
the Vehicle and Braking
Ability
The reduced tire tread depth means that there is
an increased risk of aquaplaning on wet roads.
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When driving on wet or mud-covered roads
reduce speed significantly.
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Worn Tires
DANGER
Sport tires have a smaller tread depth, and thus
can reach their wear limit sooner.
It is important to check tire wear frequently to
avoid risk of serious personal injury or death from
worn tires.
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Check tire wear frequently.

Driving on Race Circuit

(e.g. sports driving schools, motor
sport events)
Brake fluid, brake pads and brake disks
Brake fluid absorbs moisture from the air over
time. This accumulation of water lowers the
boiling point and can impair braking action if the
brakes are subjected to high temperatures, such
as can occur on race circuits (sports driving
school, motor sport events).
The brake fluid should therefore not be more than
12 months old if the vehicle is driven on race
circuits (sports driving school, motor sport
events).
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For more information, see the " Maintenance"
booklet.
Wear on the brake pads and brake disks depends
to a great extent on the driving style and driving
conditions. Wear on the brake components is
increased as a result of high temperatures, such
as can occur on race circuits (sports driving
school, motor sport events).
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Before and after driving on race circuits
(sports driving school, motor sport events), it
is important therefore to carry out a visual
inspection of the brake pads and brake disks
for wear.
Racing tires
The fitting of racing tires (e.g. slicks) for sporting
events is not approved by Porsche.
Very high cornering speeds can be achieved with
racing tires. The resulting transverse acceleration
values would jeopardise the adequate supply of oil
to the engine.
Porsche therefore refuses to accept any warranty
or liability for damage occurring as a result of non-
compliance with this provision.
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