CHEVROLET 2012 Impala - Manual (Page 269)

Black plate (39,1) Chevrolet Impala Owner Manual - 2012
Vehicle Care 10-39
outward when mounted on a
vehicle. The side of the tire that
contains a whitewall, bears
white lettering, or bears
manufacturer, brand, and/or
model name molding that is
higher or deeper than the same
moldings on the other sidewall
of the tire.
Passenger (P-Metric) Tire : A
tire used on passenger cars and
some light duty trucks and
multipurpose vehicles.
Recommended Inflation
Pressure
: Vehicle
manufacturer's recommended
tire inflation pressure as shown
on the tire placard. See Tire
Pressure on page 10‑40 and
Vehicle Load Limits on
page 9‑10.
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 : Narrow
bands, sometimes called wear
bars, that show across the tread
of a tire when only 1.6 mm
(1/16 in) of tread remains. See
When It Is Time for New Tires
on page 10‑47.
UTQGS (Uniform Tire Quality
Grading Standards)
: A tire
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 10‑49.