TYRES
5
Practical advice - 165
Tyres
Tyre and wheel safety
The tyres are the only contact between
the vehicle and the road, so it is
essential to keep them in good
condition.
You must make sure that your tyres
con- form to local road traffic
regulations.
Maintaining the tyres
The tyres must be in good condition
and the treads must have sufficient
depth: tyres approved by our Technical
Department include wear warning
strips
1
which are indicators
moulded into the tread at several
points.
When the tyre tread has been worn to
the level of the wear indicators, they
become visible
2
: it is necessary to
replace your tyres because the
tread rubber is 1.6 mm deep at
most, resulting in poor road-holding
on wet roads.
An overloaded vehicle, long journeys
by motorway, particularly in very hot
weather, or continual driving on poorly
surfaced minor roads will lead to more
rapid tyre wear and affect safety.
Incidents which occur
when driving, such as
striking the kerb, may
damage the tyres and
wheel rims, and could also lead to
misalignment of the front or rear
axle geometry. In this case, have
the condition of these checked by
an approved dealer.
Tyre pressures
Adhere to the tyre pressures (including
the emergency spare wheel). The tyre
pressures should be checked at least
once a month and before using the
vehicle on a circuit or before a long
journey (refer to the label attached to
the driver's door edge, or, depending
on the vehicle, on the bottom of the
driver's door).
Incorrect tyre
pressures lead to
abnormal tyre wear and
unusually hot running.
These are factors which may
seriously affect safety and lead to:
– poor road holding;
– the risk of blow-outs or of
throwing a tread.
The pressure depends on the
load and the speed of use. Adjust
the pressures according to the
conditions of use (refer to the
label affixed to the edge of the
driver's door, or, depending on the
vehicle, on the bottom of the
driver's door).
Pressures should be checked when
the tyres are cold. Ignore higher
pressures which may be reached in
hot weather or after driving at high
speed.