Porsche 911 Carrera Owner's Manual page 10

General safety instructions
Sport tires
Sport tires (ultra high performance tires) are
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:
– Because these tires have different tread
characteristics, they will wear considerably
faster than other summer tires. How much
faster they will wear depends on individual
driving style and service conditions.
– 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.
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– 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.
At oudside temperatures below 45°F (7°C )
change to winter tires.
Notify anyone using your car of these charac-
teristics and possible effects.
Danger!
Risk of accident through loss of road surface
contact, control over the vehicle and breaking
ability, leading to serious personal injury or
death. The reduced tire tread depth means
that there is an increased risk of aquaplaning
on wet roads.
When driving on wet or mud-covered roads
reduce speed significantly.
Danger!
Risk of accident from worn tires due to
accelerated rate of tire wear. Because these
high-performance sport tires wear faster than
most summer tires, it is important to check
tire wear frequently to avoid risk of serious
personal injury or death from worn tires.
Check tire wear frequently.
Porsche Ceramic Composite Brake
(PCCB)
Please observe the chapter "BRAKES" on page
72.
The high-performance brake system is designed
for optimal braking effect at all speeds and
temperatures. Certain speeds, braking forces
and ambient conditions (such as temperature and
humidity) therefore might cause brake noises.
Wear on the different components and braking
system, such as brake pads and brake discs,
depends to a great extent on the individual driving
style and the conditions of use and therefore
cannot be expressed in actual miles on the road.
The values communicated by Porsche are based
on normal operation adapted to traffic. Wear
increases considerably when the vehicle is driven