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Advice
WARNING
If tyre pressures are too high or too low, the
tyre m
ay deflate or burst suddenly while driv-
ing. This could result in a serious accident.
●
If the tyre pressure is too low, they could
overheat, resulting in tread detachment or
even burst tyres.
●
When driving at high speeds and/or fully
loaded, the tyre could suddenly overheat,
burst or be subject to tread detachment, with
the resultant loss of control of the vehicle.
●
Tyre pressures which are too high or too
low reduce the service life of the tyre, affect-
ing the vehicle's performance.
●
Tyre pressures should be checked regularly,
at least once a month and before long jour-
neys.
●
Adjust the pressures of all the tyres to the
vehicle load.
●
Never deflate excess pressure from hot
tyres.
CAUTION
●
Take c
are not to tilt the manometer when
placing it on the valve. Otherwise, the valve
may be damaged.
●
If tyre valves are not protected by caps, or if
the caps are not screwed on correctly, they
may become damaged. Check that the caps
are identical to the standard caps and have
been correctly tightened.
For the sake of the environment
Under-inflated tyres will increase fuel con-
sumption.
Note
When checking tyre pressures, please ob-
serve the in
structions for the tyre control sys-
tem ››› page 234.
Wear indicator depth profile
Fig. 253 Tyre tread: tread wear indicators
Tread depth
C
er
t
ain driving conditions require a deeper
tread, as well as needing the tread to be ap-
proximately the same on the front and rear
tyres. This is particularly important when
driving in winter, in cold temperatures and on
wet roads ›››
.
The minimum tread depth required by law in
the m
aj
ority
of cases is 1.6 mm (1/16 of an
inch), measured in the tread grooves next to
the tread wear indicators. Observe legal re-
quirements in each country.
Winter tyres lose much of their performance
when their tread has worn to 4 mm
(5/32 inch).
The tread depth of new tyres may vary, ac-
cording to the type and make of tyre and the
tread pattern.
Wear indicators on the tyre
The original tyres on your vehicle have
1.6 mm (1/16 inch) high ››› Fig. 253 tread
wear indicators running across the tread. A
number of these indicators are equally
spaced around the tyre tread. Certain marks
on the tyre walls (e.g. the letters “TWI” or
other symbols) indicate the position of the
wear indicators.
Tread wear indicators indicate if a tyre is
worn. They must always be replaced before
the tyre tread has worn to the level of the in-
dicator.
WARNING
Driving with worn tyres is dangerous, and
may
lead to loss of control of the vehicle with
serious consequences.
292
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