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Tires and Wheels
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e
Make sure the wheels are compatible with the
TPMS on your vehicle. For information on suitable
wheels and on the TPMS on your vehicle: Contact
an authorized Porsche dealer.
e
Have the battery level of the tire pressure sensors
checked and replaced if necessary whenever the
tires are changed.
Visit an authorized Porsche dealer, as they have
trained technicians and the necessary parts and
tools.
There are no binding standards regarding tire
strength at speeds above 150 mph (240 km/h) in
the case of ZR-quality tires.
e
Before mounting new tires, inquire about their
current approval status: Contact an authorized
Porsche dealer.
Check and replace valves and valve
caps
e
Use only genuine Porsche valves for the Tire
Pressure Monitoring System (TPMS).
e
Have the valves checked and replaced if neces-
sary whenever the tires are changed.
Porsche recommends an authorized Porsche
dealer, as they have trained technicians and the
necessary parts and tools.
In the absence of valve caps the valve is unprotected
from dust and dirt, resulting in leaks.
e
Always screw on valve caps tightly to protect
valve inserts from dirt. Dirty valve inserts can
cause creeping air loss.
e
Replace missing valve caps immediately.
e
Use only plastic valve caps.
Using snow tires
e
Install snow tires in a timely manner before the
cold season begins.
e
Snow tires should have the same load capacity as
original equipment tires and should be mounted
on all four wheels.
e
Use only tire makes tested and approved by
Porsche.
e
Before mounting new tires, inquire about their
current approval status: Contact an authorized
Porsche dealer.
Using snow chains
Snow chains can be fitted to the rear axle only, with
the tire/wheel combinations listed under "Technical
data" and marked for snow chain use.
e
Follow instructions issued by the supplier of the
chains.
e
Use only the fine-link snow chains authorized by
Porsche so that sufficient clearance between the
wheel well and the chain is assured.
f
For further information on authorized snow
chains:
Please see chapter „Wheels and tires“ on
page 285.
e
Vehicles with snow chains must not be driven
faster than 30 mph (50 km/h).
e
Remove ice and snow deposits in the wheel well
before installing the chains.
e
Remove chains as soon as the roads are free of ice
and snow.
e
Observe the different national regulations
regarding maximum speeds.
Information
If new tires are installed only on one axle, a noticeable
change in handling occurs due to the different tread
depth of the other tires. This is especially the case if
only the rear tires are replaced. However, this effect is
reduced continuously as the new tires are broken in.
WARNING
Exceeding the Maximum
Permitted Speed
Exceeding the maximum permitted speed may cause
tires to burst.
e
Observe the maximum permitted speed for the
tires.
e
Snow tires with a lower maximum permitted
speed than the given maximum permitted speed
of the vehicle may only be installed if they bear
the M+S designation on the tire sidewall. All-
season and all-terrain tires also have speed limits
and bear this designation.
e
Affix the sticker with the maximum permitted
speed in the driver’s field of vision. Observe
country-specific regulations.
e
Set the maximum permitted speed as the speed
limit using the multifunction display:
f
Please see chapter „Adjusting the speed limit“ on
page 142.
Information
At low temperatures, juddering noises caused by the
tires can occur during maneuvering or accelerating
out of curves on both dry and wet road surfaces.
The driving performance and comfort of summer
tires are impaired at low temperatures below 45 °F/
7 °C. Porsche therefore recommends that you fit
snow tires on the vehicle at temperatures below
45 °F/7 °C.
Extremely low temperatures below 5 °F/-15 °C can
cause permanent damage to summer tires.
Snow tires are no longer suitable when their tread
depth falls below 0.16 in. (4 mm).
21_718_GT4_Spyder_BAL_21_WKD 982 02 21 21_KW36.20-24.21_en_US.book Seite 223 Freitag, 24. Juli 2020 11:31 11
