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Wheels
Bead
means the part of the tire that is
made of steel wires, wrapped or
reinforced by ply cords and that is
shaped to fit the rim.
Bead separation
means a breakdown of the bond
between components in the bead.
Cord
means the strands forming the
plies in the tire .
Cold tire inflation pressure
means the ti re pressure recom-
mended by the vehicle manufac-
turer for a t ire of a des ignated
size that has not been driven for
more t han a couple of miles (kilo-
meters) at low speeds in the
three hour period before the tire
pressure is measured or adjusted.
Curb weight
means the weight of a motor ve-
hicle with standard equipment in-
cluding the maximum capacity of
fuel, oil, and coolant, air condi-
tioning and additiona l weight of
opt ional equipment.
Extra load tire
means a tire des igned to operate
at higher loads and at higher in-
2 10
flation pressures than t he corre-
spond ing standa rd tire. Extra load
tires may be identified as "XL",
"xl", "EXTRA LOAD" , or "RF" on
the sidewall.
Gross Axle Weight Rating
("GAWR ")
means the load-carrying capacity
of a single axle system , measured
at the ti re-gro und interfaces.
Gross Vehicle Weight Rating
("GVWR")
means the max imum total loaded
weight of the vehicle .
Groove
means the space between two ad-
jacent tread ribs .
Load rating (code)
means the max imum load tha t a
tire is rated t o carry for a given in-
flation pressure. You may not find
this informat ion on all ti res be-
cause it is not required by law.
Maximum load rating
means the load rating for a t ire at
the maximum permissible infla-
tion pressure for that ti re.
Maximum loaded vehicle
weight
means the sum of:
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