The measured pressure after the
•
vehicle has been parked for at
least three hours,
or
The measured pressure when the
•
vehicle is driven less than 1 mile
(1.6 km) after having been
parked for three hours.
Maximum pressure: the maximum
permissible cold tire inflation
pressure for this tire.
Recommended inflation pressure:
the inflation pressure for optimum
tire performance.
Intended outboard sidewall:
The sidewall that contains a
•
whitewall, bears white lettering
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, multi-
purpose passenger vehicles, and
trucks that have a gross vehicle
weight
rating
(GVWR)
10,000 pounds or less.
Light truck (LT) tire: a tire desig-
nated by its manufacturer as pri-
marily
intended
for
lightweight trucks or multipurpose
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 rubber 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 side-
walls of an inflated tire, excluding
elevations due to labeling, decora-
tion, 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.
of
Ply: a layer of rubber-coated par-
allel cords.
Cord: the strands forming the plies
in the tire.
use
on
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.
Vehicle care and maintenance
Tires
9
9-13