Buick 2012 Regal Owner's Manual page 338

10-52 Vehicle Care
Outward Facing Sidewall
The side of an asymmetrical tire
that has a particular side that
faces 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 53
andVehicle Load Limits on
page 9 12.
Radial Ply Tire
:
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
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.
A pneumatic
:
An
:
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 61.
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 64.
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