Maintenance
289
Tires and wheels
Kilopascal (kPa):
The metric unit
for air pressure.
Light truck (LT) tire:
A tire des
-
ignated by its manufacturer as
primarily intended for use on
lightweight trucks or multipur
-
pose passenger vehicles.
Load ratings:
The maximum
load that a tire is rated to carry
for a given inflation pressure.
Load Index:
An assigned num
-
ber 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 may be inflated.
The maximum air pressure is
molded onto the sidewall.
Maximum Load Rating:
The
load rating for a tire at the maxi
-
mum permissible inflation pres
-
sure for that tire.
Maximum Loaded Vehicle
Weight:
The sum of curb weight;
accessory weight; vehicle capac
-
ity weight; and production
options weight.
Normal Occupant Weight:
The
number of occupants a vehicle is
designed to seat multiplied by
150 pounds (68 kg).
Occupant Distribution:
Desig
-
nated seating positions.
Outward Facing Sidewall:
The
side of a asymmetrical tire that
has a particular side that faces
outward when mounted on a
vehicle. The outward facing side
-
wall bears white lettering or
bears manufacturer, brand, and/
or model name molding that is
higher or deeper than the same
moldings on the inner facing
sidewall.
Passenger (P-Metric) Tire:
A
tire used on passenger cars and
some light duty trucks and multi
-
purpose vehicles.
Ply:
A layer of rubber-coated
parallel cords.
Pneumatic tire:
A mechanical
device made of rubber, chemi
-
cals, fabric and steel or other
materials, that, when mounted
on an automotive wheel, pro
-
vides the traction and contains
the gas or fluid that sustains the
load.
Production options weight:
The
combined weight of installed
regular production options
weighing over 5 lb. (2.3 kg) in
excess of the standard items
which they replace, not previ
-
ously considered in curb weight
or accessory weight, including
heavy duty brakes, ride levelers,
roof rack, heavy duty battery,
and special trim.
Recommended Inflation Pres
-
sure:
Vehicle manufacturer's rec
-
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