231
Wheels, tyres
Tyre designations
Meanings:
e.g.
195/65
R 15 91 H
195
= Tyre width in mm
65
= Aspect ratio
(
tyre height to tyre width) in %
R
= Belt type:
R
adial
15
= Rim diameter in inches
91
= Load index
e.g.: 91 represents 618 kg
H
= 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)
Run-flat tyres (RFT)
3
Run-flat tyres have reinforced, self-
supporting sidewalls, which ensure that the
tyres always have a certain amount of
driveability, even when there is no pressure.
Run-flat tyres are only permitted on
vehicles with ESP
Plus
and tyre pressure
monitoring system or Deflation Detection
System (DDS)
3
.
Depending on the manufacturer, run-flat
tyres can be recognised by the designation
ROF
or
SSR
on the sidewall. They are only
permitted in combination with Vauxhall-
approved alloy wheels. This also applies
to winter tyres.
Driving with a damaged tyre
A loss in tyre pressure is indicated by the
tyre pressure monitoring system
3
or the
Deflation Detection System (DDS)
3
.
If a tyre has no pressure, continued driving
is possible
z
at a speed of max. 50 mph (80 km/h),
z
up to a distance of 50 miles (80 km).
Do not use a tyre repair kit.
Deflation Detection System (DDS)
3
–
see page 217.
Tyre pressure monitoring system
3
–
see page 218.
9
Warning
Even the tyre pressure of run-flat tyres
must be checked regularly.
Check tyre pressures at least every 14
days and prior to any long journey; the
tyres should be checked when cold.
9
Warning
When driving with a flat tyre, do not
exceed a speed of 50 mph (80 km/h) or a
distance of 50 miles (80 km).
The vehicle will be more difficult to steer
and handle and the braking distance will
be longer.
Adapt driving style and speed to the
conditions at hand.