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Gross vehicle weight rating or GVWR
means the value
specified by the manufacturer as the loaded weight of a single
vehicle.
Hitch Weight
The downward force exerted on the hitch ball
by the trailer coupler.
Innerliner
means the layer(s) forming the inside surface of a
tubeless tire that contains the inflating medium within the tire.
Innerliner separation
means the parting of the innerliner
from cord material in the carcass.
Maximum loaded vehicle weight
means the sum of—
(a) Curb weight; (b) Accessory weight; (c) Vehicle capacity
weight; and (d) Production options weight.
Light truck (LT) tire
means a tire designated by its
manufacturer as primarily intended for use on lightweight
trucks or multipurpose passenger vehicles.
Load rating
means the maximum load that a tire is rated to
carry for a given inflation pressure.
Maximum load rating
means the load rating for a tire at the
maximum permissible inflation pressure for that tire.
Maximum permissible inflation pressure
means the
maximum cold inflation pressure to which a tire may be
inflated.
Maximum loaded vehicle weight
means the sum of — (a)
Curb weight; (b) Accessory weight; (c) Vehicle capacity
weight; and (d) Production options weight.
Measuring rim
means the rim on which a tire is fitted for
physical dimension requirements.
Non-pneumatic rim
means a mechanical device which,
when a non-pneumatic tire assembly incorporates a wheel,
supports the tire, and attaches, either integrally or separably,
to the wheel center member and upon which the tire is
attached.
Non-pneumatic spare tire assembly
means a non-
pneumatic tire assembly intended for temporary use in place
of one of the pneumatic tires and rims that are fitted to a
passenger car in compliance with the requirements of this
standard.
Non-pneumatic tire
means a mechanical device which
transmits, either directly or through a wheel or wheel center
member, the vertical load and tractive forces from the
roadway to the vehicle, generates the tractive forces that
provide the directional control of the vehicle and does not
rely on the containment of any gas or fluid for providing those
functions.
Non-pneumatic tire assembly
means a non-pneumatic
tire, alone or in combination with a wheel or wheel center
member, which can be mounted on a vehicle.
Normal occupant weight
means 68 kilograms (150 lbs.)
times the number of occupants specified in the second
column of Table I of 49 CFR 571.110.
Occupant distribution
means distribution of occupants in a
vehicle as specified in the third column of Table I of 49 CFR
571.110.
Open splice
means any parting at any junction of tread,
sidewall, or innerliner that extends to cord material.
Outer diameter
means the overall diameter of an inflated
new tire.
Overall width
means the linear distance between the
exteriors of the sidewalls of an inflated tire, including
elevations due to labeling, decorations, or protective bands or
ribs.
Passenger car tire
means a tire intended for use on
passenger cars, multipurpose passenger vehicles, and trucks,
that have a gross vehicle weight rating (GVWR) of 10,000
pounds or less.
Pin Weight
The downward force applied to the 5th wheel or
gooseneck ball, by the trailer kingpin or gooseneck coupler.
Ply
means a layer of rubber-coated parallel cords.
Ply separation
means a parting of rubber compound
between adjacent plies.
Pneumatic tire
means a mechanical device made of rubber,
chemicals, fabric and steel or other materials, that, when
mounted on an automotive wheel, provides the traction and
contains the gas or fluid that sustains the load.
Production options weight
means the combined weight
of those installed regular production options weighing over
2.3 kilograms in excess of those standard items which
they replace, not previously considered in curb weight or
accessory weight, including heavy duty brakes, ride levelers,
roof rack, heavy duty battery, and special trim.
Radial ply tire
means a pneumatic tire in which the ply cords
that extend to the beads are laid at substantially 90 degrees
to the centerline of the tread.
Recommended inflation pressure
means the proper Cold
Inflation Pressure as shown on the Tire Information label.
Reinforced tire
means a tire designed to operate at higher
loads and at higher inflation pressures than the corresponding
standard tire.
Rim
means a metal support for a tire or a tire and tube
assembly upon which the tire beads are seated.
Rim diameter
means nominal diameter of the bead seat.
Rim size designation
means rim diameter and width.
Rim type designation
means the industry of manufacturer’s
designation for a rim by style or code.
Rim width
means nominal distance between rim flanges.
Section width
means the linear distance between the
exteriors of the sidewalls of an inflated tire, excluding
elevations due to labeling, decoration, or protective bands.
Sidewall
means that portion of a tire between the tread and
bead.
Not for
Reproduction
