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Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13527548) - 2020 - CRC - 4/11/19
VEHICLE CARE 277
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
0 277 and
Vehicle Load Limits 0 167.
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 por tion 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 por tion 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 0 285.
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 0 288.
Vehicle Capacity Weight
: The
number of designated seating
positions multiplied by
68 kg (150 lb) plus the rated cargo
load. See Vehicle Load Limits 0 167.
Vehicle Maximum Load on the
Tire
: Load on an individual tire
due to curb weight, accessor y
weight, occupant weight, and
cargo weight.
Vehicle Placard
: A label
permanently attached to a vehicle
showing the vehicle capacity
weight and the original equipment
tire size and recommended
inflation pressure. See “Tire and
Loading Information Label” under
Vehicle Load Limits 0 167.
Tire Pressure
Tires need the correct amount of
air pressure to operate effectively.
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