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10-50
Vehicle Care
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 51 and
Vehicle Load Limits on
page 9 27.
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.
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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.
Treadwear Indicators
bands, sometimes called wear
bars, that show across the tread
of a tire when only 1.6 mm
(1/16 inch) of tread remains.
See When It Is Time for New
Tires on page 10 58.
An
UTQGS (Uniform Tire Quality
:
Grading Standards)
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 61.
Narrow
:
Vehicle Capacity Weight
The number of designated
seating positions multiplied by
68 kg (150 lbs) plus the rated
cargo load. See Vehicle Load
Limits on page 9 27.
Vehicle Maximum Load on the
Tire
due to curb weight, accessory
weight, occupant weight, and
cargo weight.
A tire
:
:
Load on an individual tire
:
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