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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.
Maximum Loaded Vehicle
Weight
: The sum of curb
weight, accessory weight,
vehicle capacity weight, and
production options weight.
Normal Occupant Weight
: The
number of occupants a vehicle
is designed to seat multiplied by
150 lbs (68 kg). See Loading
the Vehicle on page 4-18.
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
Inflation - Tire Pressure on
page 5-43 and Loading
the Vehicle on page 4-18.
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.
5-42 Service and Appearance Care