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Vehicle care and maintenance
7
● Intended outboard sidewall:
• The sidewall that contains a whitewall, bears white let-
tering or bears manufacturer, brand, and/or model name
molding that is higher or deeper than the same molding
on the other sidewall of the tire, or
• The outward facing sidewall of an asymmetrical tire that
has a particular side that must always face outward
when mounted on a vehicle.
● Passenger car tire: 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.
● Light truck (LT) tire: a tire designated by its manufacturer
as primarily intended for use on lightweight trucks or mul-
tipurpose passenger vehicles.
● Tread: portion of a tire that comes into contact with the
road.
● Tread rib: a tread section running circumferentially
around a tire.
● Tread separation: pulling away of the tread from the tire
carcass.
● Carcass: the tire structure, except tread and sidewall rub-
ber which, when inflated, bears the load.
● Sidewall: portion of a tire between the tread and bead.
● Section width: the linear distance between the exteriors of
the sidewalls of an inflated tire, excluding elevations due
to labeling, decoration, or protective bands.
● Bead: 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.
● Ply: a layer of rubber-coated parallel cords.
● Cord: the strands forming the plies in the tire.
● Rim: a metal support for a tire or a tire and tube assembly
upon which the tire beads are seated.
● Rim diameter: nominal diameter of the bead seat.
● Groove: the space between two adjacent tread ribs.
Tire Markings
BK0120400US.book 24 ページ ２０１０年５月１２日 水曜日 午前１０時５０分
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