Tread Depth; Changing Tyre And Wheel Size; Wheel Covers - Vauxhall Astra 2021 Owner's Manual

212 Vehicle care

Tread depth

Check tread depth at regular
intervals.
For safety reasons, it is
recommended that the tread depth of
the tyres on one axle should not vary
by more than 2 mm.
The legally permissible minimum
tread depth (1.6 mm) has been
reached when the tread has worn
down as far as one of the tread wear
indicators (TWI). Their position is
indicated by markings on the
sidewall.
If there is more wear at the front than
the rear, swap round front wheels and
rear wheels periodically. Ensure that
the direction of rotation of the wheels
remains the same.
Tyres age, even if they are not used.
We recommend tyre replacement
every six years.
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 systems
and make other vehicle modifications.
Have the label with tyre pressures
replaced.
9 Warning
The use of unsuitable tyres or
wheels may lead to accidents and
will invalidate the vehicle
operating permit.

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 wheel 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.
Vehicles with steel wheel rims: When
using locking wheel nuts, do not
attach wheel covers.
Temporary spare wheel: Do not use
wheel covers.