Ferrari F430 SPIDER Owner's Manual page 116

the tyres which may not always be visible.
Check the tyres regularly for any signs of
damage (e.g., scratches, cuts, cracks, bulges,
etc.).
Sharp objects that have penetrated the tyres
may have caused damage, which can only
be diagnosed by removing the tyre.
Have any damage inspected by an expert as
it may considerably reduce tyre life.
Remember that tyres deteriorate with time
even if used little or not at all.
Cracks in the tread and sidewalls, possibly
accompanied by bulging, are sure signs of
ageing.
Have the tyres changed by an Authorised
Ferrari Service Centre who have the
necessary equipment available in order to
prevent damage to the sensor located inside
the wheel of vehicles equipped with the tyre
pressure monitoring system.
Have a qualified technician decide whether
old tires are suitable for use.
It is recommended to replace the tyres after six
years of normal use.
Frequent use in maximum load conditions
and high temperatures may accelerate ageing.
Tyres that have been on a vehicle for more
than 3 years must be checked by a qualified
technician.
Never fit tyres of uncertain origin.
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The tyres are of the "unidirectional"
type and there is an arrow on the
side indicating the rolling direction or the
outside. When changing the tyres, ensure
that the rolling direction corresponds to
that indicated in order to maintain optimal
performance.
Tyres on the same axle must always be
replaced in pairs.
Regularly check the tread (minimum
acceptable depth 1.7 mm). The less tread
depth, the greater the risk of skidding.
Drive carefully on wet roads to
reduce the risk of "aquaplaning".
Tyre pressure monitoring system
(optional)
See the description of the system and the
warning messages on page 138.
Wheel balancing
The wheels complete with tyres must
be balanced by the Ferrari Service
Network or by skilled staff.
You are advised to use only self-adhesive
weights.
Application instructions
Proceed as follows to fit the counterweights:
• Use heptane to thoroughly clean the part
of the rim where the counterweight will
be applied.
• Remove the backing paper and apply
the weight to the wheel, pressing down
evenly to ensure perfect adhesion.