Chevrolet 2009 Cobalt Owner's Manual page 331

CAUTION:
{
Mixing tires could cause you to lose control
while driving. If you mix tires of different
sizes, brands, or types (radial and bias-belted
tires), the vehicle may not handle properly,
and you could have a crash. Using tires of
different sizes, brands, or types may also
cause damage to your vehicle. Be sure to
use the correct size, brand, and type of
tires on all wheels. It is all right to drive
with your compact spare temporarily, as it
was developed for use on your vehicle.
See Compact Spare Tire on page 5-109.
CAUTION:
{
If you use bias-ply tires on the 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 the vehicle.
If you must replace your vehicle's tires with those
that do not have a TPC Spec number, make
sure they are the same size, load range, speed
rating, and construction type (radial and
bias-belted tires) as your vehicle's original tires.
Vehicles that have a tire pressure monitoring
system could give an inaccurate low-pressure
warning if non-TPC Spec rated tires are installed
on your vehicle. Non-TPC Spec rated tires may
give a low-pressure warning that is higher or lower
than the proper warning level you would get
with TPC Spec rated tires. See Tire Pressure
Monitor System on page 5-64.
Your vehicle's original equipment tires are listed
on the Tire and Loading Information Label.
See Loading the Vehicle on page 4-26, for more
information about the Tire and Loading Information
Label and its location on your vehicle.
5-73