Dodge 2007 Sprinter Owner's Manual page 204

You could lose control of the vehicle as a re-
sult, cause an accident and injure yourself
or others.
Avoid driving up against curbs or parking the
vehicle with part of the tire tread surface on
the curb.
Life of tire
The service life of a tire depends on varying
factors including but not limited to:
Driving style
Tire inflation pressure
Distance driven
Warning
Tires and spare tire should be replaced after
6 years, regardless of the remaining tread.
Tread depth
Do not allow your tires to wear down too
far. Adhesion properties on wet roads are
sharply reduced at tread depths under
1
/ in (3 mm) for summer tires and
8
(4 mm) for winter tires.
Treadwear indicators (TWI) are required by
law. These indicators are located in six
places on the tread circumference and be-
come visible at a tread depth of approxi-
1
mately / in (1.6 mm), at which point
16
the tire is considered worn and should be
replaced.
Recommended minimum tire tread depth:
1
Summer tires /
G
1
Winter tires /
6
Warning
Although the applicable federal motor safety
laws consider a tire to be worn when the
1
/ in
6
Treadwear Indicators (TWI) become visible
at approximately
ommend that you do not allow your tires to
wear down to that level. As tread depth ap-
proaches
1
/
properties on a wet road are sharply re-
duced.
Depending upon the weather and/or road
surface (conditions), the tire traction varies
widely.
in (3 mm)
8
in (4 mm)
Tires and wheels
1
/ in (1.6 mm), we rec-
16
1
/ in (3 mm) for summer tires or
8
in (4 mm) for winter tires, the adhesion
6
G
4