Maserati Gransport Owner's Manual page 193

Have the old tires inspected
by an experienced tire fitter,
to make sure they can still be
used safely. If the same tire has been
on your car for 4 or 5 years, have it
inspected by an experienced tire fitter.
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
marked by the arrow.
During the tire life the rolling
direction of the first fitting
shall always be observed, also
in case of "non-directional" tires.
Check the depth of the tire
tread at regular
intervals(minimum allowed
value 0.063 in - 1.6 mm). The thinner is
the tread, the greater is the risk of
skidding.
Drive carefully on wet roads
to decrease the risk of
aquaplaning.
8
Wheels and tires 193