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Wheels
WARNING
●
Alwa
ys adapt the tyre pressure accordingly
when the vehicle load changes.
●
A tyre with low air pressure has to flex a lot
more when the vehicle is heavily loaded or at
high speeds, therefore causing overheating
to occur. Under these conditions, the tyre
bead may be released or the tyre may burst.
Risk of accident!
For the sake of the environment
Under-inflated tyres will increase fuel con-
sumption.
Wear indicators
Fig. 238 Tyre tread: tread wear indicators
Tread wear indicators indicate if a tyre is
w
orn.
The origin
al
tyres on your vehicle have
1.6 mm high “tread wear indicators” running
across the tread. Depending on the manufac-
turer, there will be 6 to 8 of them spaced at
equal distances around the tyre. Markings on
the tyre sidewall (for instance the letters
“TWI” or a triangle) indicate the positions of
the tread wear indicators.
The minimum tread depth required by law is
1.6 mm (measured in the tread grooves next
to the tread wear indicators). (Different fig-
ures may apply in other countries.)
WARNING
The tyres must be replaced at the latest when
the trea
d is worn down to the tread wear indi-
cators. Failure to follow this instruction could
result in an accident.
●
Especially in difficult 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 insufficient
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 affected.
●
The speed has to be adapted accordingly,
otherwise there is a risk of losing control over
the vehicle.
Changing wheels
Fig. 239 Interchanging tyres.
To ensure that the wear is equal on all tyres
the wheel
s
shou
ld be changed round from
time to time according to the system
››› Fig. 239. The useful life of all the tyres will
then be about the same time.
New tyres or new wheels
–
All four wheels must be fitted with tyres of
the s
ame type, s
iz
e (rolling circumference)
and preferably the same tread pattern.
–
Tyres should be replaced at least in pairs
and not individually (i.e. both front tyres or
both rear tyres together).
–
Do not use tyres whose effective size ex-
ceeds the dimensions of the factory-ap-
proved makes of tyre.
»
257
Technical dataAdviceOperationEmergenciesSafety
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