Vauxhall 2010 Astra, Owner'S Manual

Page: 232 / 367

228 Driving and operation
Picture no: 17216t.tif
The legally permissible minimum tread
depth (1.6 m m) 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 a re 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 suc h tyres.
z Never fit used tyres the prev ious history
and use of w hich you do not know.
z So as not to im pair brake cooling , use
only wheel trims app rov ed for use on
your vehicle.
Tyre d esigna tions
Meaning s:
e.g. 195/65 R 15 91 H
Speed code letters:
1) TWI
=
T
read
W
ear
I
ndicator.
195 = Tyre width in mm
65 = Cross-section ratio
(tyre d epth to width) in %
R = Belt type Radial
RF = Type: Run-flat
15 = Wheel d ia meter in inch
91 = Load ind ex
e.g . 91 corresp onds to 618 k g
H = Speed cod e letter:
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)