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Wheels and tyres
279
Important information about wheels and tyres
1)
Follow the regulations of the country you are driving in.
Tread wear indicators
Fig.181 T
yre profile: tread wear indicators.
Fig.182 Int
erchanging tyres.
Wear indicators around 1.6mm high can be
f
ound on the base of the original tyre treads,
ordered at regular intervals and running across
the tread ›››Fig.181. The letters “TWI” or trian-
gles on the sidewall of the tyre mark the posi-
tion of the wear indicators.
The minimum permitted pr
ofile depth
1)
have
been reached when the tyres have worn down
to the wear indicators. Replace the tyres with
new ones ›››
.
Changing wheel
s around
In order to wear the wheels in a uniform manner,
it is recommended to interchange them regu-
larly according to the diagram ›››Fig.182. The
useful life of all the tyres will then be about the
same time.
WARNING
The tyres must be replaced at the latest
when the tr
ead is worn down to the tread
wear indicators. Failure to follow this instruc-
tion could result in an accident.
●
Particularly in dicult driving conditions
such as wet or icy roads. It is important that
the tyre tread be as deep as possible and be
approximately the same on the tyres of both
the front and the rear axles.
●
The scant driving safety due to insucient
tread depth is particularly evident in vehicle
handling, when there is a risk of “aquaplan-
ing” in deep puddles of water and when driv-
ing through corners, and braking is also ad-
versely aected.
●
The speed has to be adapted accordingly,
otherwise there is a risk of losing control over
the vehicle.
Wheel nuts
The wheel bolts and rims hav
e been designed
to be part of an assembly. When installing
dierent wheels (for instance alloy wheels or
wheels with winter tyres) it is important to use
the correct wheel bolts with the right length
and correctly shaped bolt heads. This ensures
that wheels are fitted securely and that the
brake system functions correctly.
The wheel bolts must be clean and turn easily.
A special adapter is required to turn the anti-
theft wheel bolts ›››page284.
WARNING
Wheel nuts should never be greased or oiled.
●
Use only wheel bolts which belong to the
wheel.
●
If the prescribed torque of the wheel bolts
is t
oo low, they could loosen whilst the vehi-
cle is in motion. Risk of accident! If the tight-
ening torque is too high, the wheel bolts and
threads can be damaged.
NOTICE
See ›››page286 t
o find out the recommen-
ded tightening torque for wheel nuts for steel
and alloy rims.
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