Wheels Maintenance - Maserati GranTurismo Owner's Manual

Maintenance and Care

Wheels Maintenance

Tires Maintenance
CAUTION!
To obtain the best performances and
the longest mileage from the tires, take
following precautions during the first
500 km (310 mi):
• do not drive at the vehicle's maximum
speed;
• drive at low speed on curves;
•
avoid sudden steering;
•
avoid sudden braking;
• avoid sudden acceleration;
• do not drive at high speeds for too
long.
The tires inflation pressure must
correspond to the prescribed value (see
chapter "Tire Inflation Pressure" in
section "Technical Specifications") and
should be checked only when the tires
have cooled down. In fact, the pressure
7
increases as the tire temperature
progressively increases.
Never reduce the pressure if tires are hot
(see chapter "Tires Information" chapter
in section "Understanding the Vehicle").
Insufficient tire inflating pressure can
cause tire overheating and possible
internal damage, which may even lead to
the tire destruction.
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CAUTION!
After inspecting or adjusting the tire
pressure, always reinstall the valve stem
cap. This will prevent moisture and dirt
from entering the valve stem, which
could damage it.
Impacts with curbs, holes, and obstacles
in the road, and prolonged trips on rough
roads or off-road trails can cause tire
damage which may not be visible to the
naked eye.
Check your tires regularly for any signs
of damage (e.g. scratches, cuts, cracks,
bulges, etc.). If sharp objects penetrate
the tires, they can cause structural
damage which is only visible when the
tire is removed.
In any case, any possible damage
must be inspected by an experienced
technician, as it may seriously reduce the
tire life.
Remember that tires deteriorate with
time, even if used little or not at all.
Cracks in the tire tread and sides,
alongside possible bulging, are a sign of
deterioration.
WARNING!
• Check the inflating pressure of the
tires when cold, at least every two
weeks and before long trips.
• Have the 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 shall
always be observed, also in case of
"nondirectional" tires.
• Check the depth of the tire tread
at regular intervals. The minimum
allowed value is 1.6 mm (0.06 in) or
4 mm (0.16 in) for winter, all-season
and snow tires, at that point the wear
indicators on the tire will be visible
(see chapter "Tires Information" in
section "Understanding the Vehicle").
The thinner is the tread, the greater is
the risk of skidding.