349
Operation
Tires and wheels
4
Life of tire
The service life of a tire depends on vary-
ing factors including but not limited to:
ț Driving style
ț Tire inflation pressure
ț Distance driven
Tread depth
Do not allow your tires to wear down too
far. Adhesion properties on wet roads
are sharply reduced at tread depths un-
der
1
/
8
in (3 mm) for summer tires and
1
/
6
in (4 mm) for winter tires.
Treadwear indicators (TWI) are required
by law. These indicators are located in
six places on the tread circumference
and become visible at a tread depth of
approximately
1
/
16
in (1.6 mm), at
which point the tire is considered worn
and should be replaced.
Recommended minimum tire tread
depth:
ț Summer tires
1
/
8
in (3 mm)
ț Winter tires
1
/
6
in (4 mm)
Warning G
Tires and spare tire should be replaced af-
ter 6 years, regardless of the remaining
tread.
nf_BA.book Page 349 Friday, January 25, 2008 3:53 PM
