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Vehicle Care
GAWR RR
:
Gross Axle Weight Rating
for the rear axle. See
.
Intended Outboard Sidewall
:
The side
of an asymmetrical tire, that must
always face outward when mounted on
a vehicle.
Kilopascal (kPa)
:
The metric unit for air
pressure.
Light Truck (LT-Metric) Tire
:
A tire used
on light duty trucks and some
multipurpose passenger vehicles.
Load Index
:
An assigned number
ranging from 1 to 279 that corresponds
to the load carrying capacity of a tire.
Maximum Inflation Pressure
:
The
maximum air pressure to which a cold
tire can be inflated. The maximum air
pressure is molded onto the sidewall.
Maximum Load Rating
:
The load rating
for a tire at the maximum permissible
inflation pressure for that tire.
Occupant Distribution
:
Designated
seating positions.
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
and
.
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
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
