Opel Corsa Owner's Manual page 176

170 Driving and operation
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Tyre condition, wheel condition
Drive over edges slowly and at a right
angle if possible. Driving over sharp edges
can lead to hidden tyre damage and wheel
damage. Do not wedge tyres against the
kerb.
Regularly check tyres for damage. Seek the
assistance of a workshop in the event of
damage or unusual wear.
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Tread depth
Check tread depth regularly.
For reasons of safety, tyres should be
replaced when their tread depth has worn
down to 2 to 3 mm (winter tyres: 4 mm).
The legally permissible minimum tread
depth (1.6 mm) has been reached when
the tread has worn down as far as one of
1)
the wear indicators (TWI ). A number of
wear indicators are spaced at equal
intervals around the tyre within the tread.
Their position is indicated by markings on
the tyre sidewall.
1) TWI T W I
= read ear ndicator.
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If wear in the front is greater than that in
the rear, move the rear wheels to the front
axle and vice versa.
Correct tyre pressure.
On vehicles fitted with a deflation
detection system 3, initialise the system
3 164.
General information
z The danger of aquaplaning is greater if
the tyres are worn.
z Tyres age, even if they are not used or
used infrequently. We recommend tyre
replacement every six years at the latest.
z Never fit used tyres the previous history
and use of which you do not know.
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