Porsche 911 2020, Owner'S Manual

Page: 306 / 360

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Wheels and Tires
304
e CAR e CONTROL e Vehicle e TPMS e
Tire selection
Selecting full load or partial load
e
CAR
e
CONTROL
e
Vehicle
e
TPMS
e
Full load
Full load
Full load is activated.
Full load
Partial load is activated.
e
Adapt the tire pressures to the selected load
type.
Information
If the option Full load is not displayed, the specified
tire pressures are valid for all types of vehicle load.
Selecting comfort pressure or standard
pressure
The tire pressures can be reduced to enhance
comfort.
With comfort pressure, the Tire Pressure Monitoring
System automatically uses lower target pressures
for tire pressure monitoring.
e CAR e CONTROL e Vehicle e TPMS e
Comfort pressure
Comfort pressure
Comfort pressure is activated.
Comfort pressure
Standard pressure is activated.
e Adjust tire pressures to comfort pressure or
standard pressure.
Learning the Tire Pressure Monitoring System
After the tires have been changed, the wheel sensor
has been replaced, or the tire settings have been
updated, the Tire Pressure Monitoring System starts
learning the tires. The tire pressure control system
recognizes the wheels and their installation position.
The position and pressure data is available as soon
as theTire Pressure Monitoring System has assigned
the recognized wheels to the correct wheel position.
During this process, the required pressures for cold
tires (68 °F (20 °C)) are displayed in the PCM and a
message appears on the instrument cluster.
The tire pressure warning light
in the instrument
cluster remains lit until all the wheels have been
learned.
Uniform Tire Quality Grading and
Glossary of Tire Terminology
WARNING
Tire Abuse
The temperature grade for this tire is established for
a tire that is properly inflated and not overloaded.
Excessive speed, underinflation, or excessive load-
ing, either separately or in combination, can cause
heat buildup and possible tire failure.
e Do not exceed the permitted maximum speed for
the tires fitted to the vehicle.
e Ensure that the tires are set to the correct infla-
tion pressure.
e Observe the maximum load for the vehicle.
Fig. 243: Treadwear, Traction and Temperature of the Tire
Quality grades can be found where applicable on the
tire sidewall between tread shoulder and maximum
section width. All passenger vehicle tires must con-
form to Federal Safety Requirements in addition to
these grades. Quality grades can be found where
applicable.
Treadwear
The treadwear grade is a comparative rating based
on the wear rate of the tire when tested under con-
trolled conditions on a specific government test
course. For example, a tire graded 150 would wear
one and a half (1-1/2) times as well on the govern-
ment course as a tire graded 100. The relative per-
formance of tires depends upon the actual
conditions of their use, however, and may depart
significantly from the norm due to variations in driv-
ing habits, service practices and differences in road
characteristics and climate.
>
Please see chapter "Checking tire tread" on
page 309.