Vehicle Care 345
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 0 346 and Vehicle
Load Limits 0 255.
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 0 352.
UTQGS (Uniform Tire Quality
Grading Standards)
: A tire
information system that provides
consumers with ratings for a
tire's traction, temperatur e, and
treadwear. Ratings are
determined by tire
manufacturers using
government testing procedu res.
The ratings are molded into the
sidewall of the tire. See Uniform
Tire Quality Grading 0 355.
Vehicle Capacity Weight
: The
number of designated seating
positions multiplied by
68 kg (150 lb) plus the rated
cargo load. See Vehicle Load
Limits 0 255.
Vehicle Maximum Load on the
Tire
: Load on an individual tire
due to curb weight, accessory
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 0 255.
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