Ferrari 612 Scaglietti Owner's Manual page 131

If sharp objects penetrate the tyres, they can cause damage which is
only visible when the tyre is removed.
Have any damage inspected by an expert as it may considerably reduce
tyre life.
Remember that tyres deteriorate over time, even if they are rarely used
or not used at all.
Cracks in the tread and side walls, possibly accompanied by bulging,
are sure signs of ageing.
Have the tyres replaced by an authorised service centre of the F
S N , who has the required equipment in order to avoid damage
ERVICE ETWORK
to the sensor inside the wheel rim, which could be caused by improperly
performed procedures.
Have old tyres inspected by an experienced tyre fitter to make sure that they
can be used safely. In any case, tyres that have remained on a vehicle for more
than 3 years must be checked by skilled personnel.
We recommended that you replace the tyres after six years of normal use.
Frequent use in maximum load conditions and high temperatures may
accelerate ageing.
In any case, tyres that have remained on a vehicle for more than 3 years must
be checked by skilled personnel.
Never fit tyres of uncertain origin.
The car is fitted with "directional" tyres. The arrow
marked on the sidewall indicates the correct direction of
rotation or which is the outer side. In the case of replacement,
maximum performance levels can only be ensured if the
rotation direction corresponds with the direction indicated
by the arrow.
Tyres on the same axle must always be replaced in pairs.
Check the tread groove depth regularly (minimum acceptable depth
1.7 mm). As the tread wear increases, there is a greater risk of skidding.
Drive carefully on wet roads to reduce the risk of
"aquaplaning".
Wheel balancing
The wheels complete with tyres must be balanced by an authorised
service centre of the Ferrari Service Network or by skilled staff.
You are advised to use only self-adhesive wheel weights.
Snow chains
The use of chains is subject to the laws applying in each country.
The snow chains must be fitted only on the driving wheels.
Only use low edged chains.
ERRARI
Keep a moderate speed, and try to avoid holes and steps.
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