Porsche Cayenne 2020, Руководство пользователя

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Wheels and Tires
324
M+S designation or the snowflake symbol, de-
pending on the country, on the tire sidewall. Ob-
serve country-specific regulations.
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.
e
Install snow tires in a timely manner before the
cold season begins.
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.
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 if their tread depth
is less than 0.16 in. (4 mm).
Using snow chains
Install snow chains only on the rear wheels and only
with the tire/rim combinations designated for use
with snow chains listed in the Technical Data.
e
Only use snow chains approved by Porsche so
that sufficient clearance between the wheel well
and chain is assured.
e Remove ice and snow deposits in the wheel well
before installing the chains.
e Observe the different national regulations re-
garding maximum speeds.
Checking tire tread
e The treadwear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specific gov-
ernment test course. For example, a tire graded
150 would wear one and a half (1-1/2) times as
well on the government course as a tire graded
100. The relative performance of tires depends
upon the actual conditions of their use, however,
and may depart significantly from the norm due
to variations in driving habits, service practices
and differences in road characteristics and
climate.
e
Check tire tread regularly, particularly before and
after long journeys.
e
The original equipment tires on your Porsche
have built-in tire wear indicators. They are
molded into the bottom of the tread grooves and
will appear as approximately 1/2 in. (12 mm)
bands when the tire tread depth is down to 1/16
of an inch (1.6 mm).
e When the indicators appear in two or more adja-
cent grooves, it is time to replace the tires. We
recommend, however, that you do not let the
tires wear down to this extent.
e Worn tires cannot grip the road surface properly
and are even less effective on wet roads.
e For safety reasons, replace the tires before the
wear indicators appear. Snow tires are no longer
suitable when their tread depth falls below 5/32
in. (4 mm).
e In the United States, state laws may govern the
minimum tread depth permissible. Follow all
such laws.
Measuring tire tread depth
e Insert a commercially available tread depth
gauge or caliper in the tire tread and measure the
tire tread depth.
Storing wheels
e Always store wheels in a cool, dry and dark place.
Store tires without rims vertically.
e Do not store summer tires or park vehicles with
summer tires mounted at ambient temperatures
under 5 °F (-15 °C).
e Avoid contact with gas, oil or grease.
e Tires must not be more than 6 years old. Chem-
ical additives, which make the tire rubber elastic,
lose their effectiveness over the course of time
and the rubber becomes brittle. The age of the
tire can be seen from the "DOT" code number
shown on the tire sidewall. If, for example, the
last four digits read 3016, then the tire was pro-
duced in the 30th week of 2016.
Balancing wheels
As a precaution, have wheels balanced in spring
(summer tires) and before winter (M+S tires) by an
authorized Porsche dealer.
e Visit an authorized Porsche dealer. Porsche rec-
ommends an authorized Porsche dealer, as they
have trained technicians and the necessary parts
and tools.