Pontiac 2004 Bonneville, Owner'S Manual

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That way your vehicle will continue to have tires that are
designed to give proper endurance, handling, speed
rating, load range, traction, ride and other things during
normal service on your vehicle. If your tires have an
all-season tread design, the TPC number will be followed
by an “MS” (for mud and snow).
If you ever replace your tires with those not having a
TPC Spec number, make sure they are the same size,
load range, speed rating and construction type (bias,
bias-belted or radial) as your original tires.
{
CAUTION:
Mixing tires could cause you to lose control
while driving. If you mix tires of different sizes
or types (radial and bias-belted tires), the
vehicle may not handle properly,
CAUTION: (Continued)
CAUTION: (Continued)
and you could have a crash. Using tires of
different sizes may also cause damage to your
vehicle. Be sure to use the same size and type
tires on all wheels. It’s all right to drive with
your compact spare temporarily, it was
developed for use on your vehicle. See
“Compact Spare Tire” in the index.
{
CAUTION:
If you use bias-ply tires on your vehicle, the
wheel rim flanges could develop cracks after
many miles of driving. A tire and/or wheel
could fail suddenly, causing a crash. Use only
radial-ply tires with the wheels on your vehicle.
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