Peterbilt 579 - Page 375

TIRES AND WHEEL
Replacing Tires
Front: Replace
front tires when less
than 4/32 in. of tread remains. Check
at three places equally spaced around
the tire.
Drive Axles
or Trailers: Replace tires
on drive axles or trailers when less than
2/32 in. of tread depth remains in any
major groove. Check at three places
equally spaced around the tire. See
the next illustration for recommended
measuring points for tread depth.
Steer Tire Points (left), Drive Tire
Points (right)
(04/13)
WARNING!
Do not replace original equipment
tires with load ratings less than the
original tires. Doing so could lead to
unintentional overloading of the tire,
which could cause a failure resulting
in loss of vehicle control and an acci
-
dent. Failure to comply may result in
death, personal injury, equipment or
property damage.
NOTE
To
prolong your tires’ life and make
them safer, have their radial and lateral
run-out checked at your dealer. And
of course, you should have your tires
balanced anytime you change a tire.
Y53-6047–2C
Greenhouse Gas Certied Tires
Replacing a
tire that is greenhouse
gas certied.
NOTE
The tires installed on this vehicle at the
factory as original equipment may be
certied for Greenhouse Gas and Fuel
Efciency regulations. Replacement
tires must be of equal or lower rolling
resistance level (TRRL or C
rr
). Consult
with your tire supplier(s) for appropri
-
ate replacement tires.
Verify if your vehicle is equipped with
Greenhouse Gas certied tires by
checking the Vehicle Emission Control
label on the driver's side door frame. If
these tires were installed at the factory,
Lower Rolling Resistance codes (LRR)
identify which tires are certied.
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