Cadillac 2009 STS, Owner'S Manual

Page: 387 / 514

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 Inflation - Tire
Pressure on page 5-64 and Loading the Vehicle
on page 4-24.
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 1/16 inch (1.6 mm) of tread remains.
See When It Is Time for New Tires on page 5-73.
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 5-77.
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 4-24.
5-61