Chevrolet Cruze Owner's Manual page 134

130 Vehicle care
Warning
If the pressure is too low, this can
result in considerable tyre warmup
and internal damage, leading to tread
separation and even to tyre blow-out
at high speeds.
TREAD DEPTH
Check tread depth at regular intervals.
Tyres should be replaced for safety
reasons at a tread depth of 2-3 mm
(4mm for winter tyres).
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. Ensure that the direction of
rotation of the wheels is the same as
before.
Tyres age, even if they are not used. We
recommend tyre replacement every 6
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 reprogram the speedome-
ter 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.