16 3
The legally permissible minimum tread
depth (1.6 mm) has been reached when
the tread has worn down as far as one of
the w ear indicators (TWI
1)
). A number of
wear indicators a re spaced at equal
intervals around the tyre within the tread.
Their position is indicated by markings on
the tyre sidewall.
General information
z The danger of aq uap laning is greater if
the tyres are worn.
z Tyres age, even if they are used only very
little or not at all. A spare wheel which
has not b een used for six years should be
used only in emergencies; drive slowly
when using such tyres.
z Never fit used tyres the previous history
and use of which you do not know.
z So as not to im pair brake cooling, use
only wheel trims app roved for use on
your vehicle.
Tyre designations
Meaning s:
e.g. 155/8 0 R 13 7 9 T
155 = Tyre width in mm
80 = Aspect ratio
(tyre height to tyre width in %)
R = Belt type: Radial
13 = Whe el d ia mete r in inche s
79 =Load index
e. g.: 79 corresponds to 437 kg
T =Speed code
Speed code letters:
Q Up to 100 mph (160 km/h)
S Up to 112 mph (180 km/h)
T Up to 118 mph (190 km/h)
H Up to 130 mph (210 km/h)
V Up to 150 mph (240 km/h)
W Up to 168 mph (270 km/h)
1)
TWI = T rea d Wear Indicato r.
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