Vauxhall 2012 Astra, Owner'S Manual

Page: 182 / 225

Vehicle care 181
Changing tyre and wheel
size
If tyres of a different size than those
fitted at the factory are used, it may be
necessary to reprogramme the
speedometer as well as the nominal
tyre pressure and make other vehicle
modifications.
After converting to a different tyre
size, have the label with tyre
pressures replaced.
9 Warning
Use of unsuitable tyres or wheels
may lead to accidents and will
invalidate the vehicle type
approval.
Wheel covers
Wheel covers and tyres that are
factory approved for the respective
vehicle and comply with all of the
relevant wheel and tyre combination
requirements must be used.
If the wheel covers and tyres used are
not factory approved, the tyres must
not have a rim protection ridge.
Wheel covers must not impair brake
cooling.
9 Warning
Use of unsuitable tyres or wheel
covers could lead to sudden
pressure loss and thereby
accidents.
Tyre chains
Use tyre chains only on front wheels.
Tyre chains are permitted on tyres of
size 225/55 R 17 and 235/45 R18.
Always use fine mesh chains that add
no more than 10 mm to the tyre tread
and the inboard sides (including chain
lock).
9 Warning
Damage may lead to tyre blowout.
On tyres of size 245/45 R 18, special
snow chains are only permitted when
they are designed with a rotating
chain belt on the tyre tread, no chain
links on the wheel inboard sides and
the chains add no more than 12 mm
to the tyre tread. For further
information of right snow chain usage
for this tyre size, contact a specialized
vehicle parts dealer or snow chain
manufacturer.
Tyre chains are not permitted on tyres
of size 235/55 R 17, 235/50 R 18,
235/45 R 19, 245/40 R 20.
The use of tyre chains is not permitted
on the temporary spare wheel.