Maserati Ghibli 2021 Owner's Manual page 288

Maintenance and Care
WARNING!
• Check the inflating pressure of the
tires when cold, at least every two
weeks and before long trips.
• Have old tires inspected by an
experienced technician, to make
sure they can still be used safely.
If the same tire has been on your
vehicle for 4 or 5 years, have it
inspected anyway by an experienced
technician.
•
Never fit tires of uncertain origin.
•
"Directional" tires have an arrow
on their side showing the rolling
direction. To keep the best
performance when replacing a tire,
make sure that the rolling direction
corresponds to the one shown by the
arrow.
• During the tire life, the rolling
direction used for the first fitting
should always be observed, also in
case of "nondirectional" tires.
• Check the depth of the tire tread
at regular intervals. The minimum
allowed value is 0.06 in (1.6 mm) or
8
0.6 in (4 mm) for winter, all-season
and snow tires, at that point the
wear indicators on the tire will
be visible ( : chapter "Tires
284
Information" in section"Safety"). The
thinner is the tread, the greater is
the risk of skidding.
•
Drive carefully on wet roads to
decrease the risk of aquaplaning.
Winter Tires
These tires are specially designed for
driving on snow and ice and are fitted
to replace the ones supplied with the
vehicle.
The specific functions of the winter
tires lead to lower performance under
normal environmental conditions or on
long highway trips, compared to the
standard tires.
Therefore, their use should be limited
to the situations and performance for
which they have been type-approved.
The Authorized Maserati Dealer can
provide all necessary information
about fitting winter tires on the
vehicle.
NOTE:
• We recommend fitting winter tires
on the vehicle at temperatures
below 45 ° F (7 ° C) since the driving
performance of summer tires is
reduced at low temperatures.
Summer tires may be permanently
damaged at extremely low
temperatures.
• Comply with all state and local laws
governing snow tire and tread depth
requirements.
Wheel Rims Maintenance
All wheel trims should be cleaned
regularly with a mild soap and water.
To remove heavy soil and/or excessive
brake dust, use a nonabrasive, non-
acidic cleaner.
Do not use scouring pads, steel wool, a
bristle brush, or metal polishes.
Do not use oven cleaner that may
affect and damage the brake calipers.
Avoid automatic car washes that use
acidic solutions or harsh brushes that
may damage the wheel rim protective
finish.