7-30 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
BK0125300US.book 30 ページ ２０１０年５月１８日 火曜日 午後１時５３分
