Pontiac 2009 G8 Owner's Manual page 252

9-48 Vehicle Service and Care
Radial Ply Tire A pneumatic
:
tire in which the ply cords that
extend to the beads are laid
at 90 degrees to the centerline
of the tread.
Rim A metal support for a
:
tire and upon which the
tire beads are seated.
Sidewall The portion of a tire
:
between the tread and the bead.
Speed Rating An alphanumeric
:
code assigned to a tire
indicating the maximum speed
at which a tire can operate.
Traction The friction between
:
the tire and the road surface.
The amount of grip provided.
Tread The portion of a tire that
:
comes into contact with the road.
Treadwear Indicators
bands, sometimes called
wear bars, that show across
the tread of a tire when only
1/16 inch (1.6 mm) of tread
remains. See When It Is Time
for New Tires on page 9-59.
UTQGS (Uniform Tire Quality
Grading Standards)
:
information system that provides
consumers with ratings for a
tire's traction, temperature,
and treadwear. Ratings are
determined by tire manufacturers
using government testing
procedures. The ratings are
molded into the sidewall of the
tire. See Uniform Tire Quality
Grading on page 9-62.
Narrow Vehicle Capacity Weight
:
The number of designated
seating positions multiplied
by 150 lbs (68 kg) plus the rated
cargo load. See Loading the
Vehicle on page 8-30.
Vehicle Maximum Load on
the Tire
A tire tire due to curb weight,
accessory weight, occupant
weight, and cargo weight.
Vehicle Placard
permanently attached to a
vehicle showing the vehicle's
capacity weight and the original
equipment tire size and
recommended inflation pressure.
See "Tire and Loading
Information Label" under
Loading the Vehicle on
page 8-30.
:
Load on an individual
:
A label
: