Ply A layer of rubber-coated parallel
cords.
Ply
separation
A parting of rubber compound
between adjacent plies.
Pneumatic
tire
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.
Radial ply tire A pneumatic tire in which the ply
cords that extend to the beads are laid
at substantially 90 degrees to the
center line of the tread.
Reinforced
tire
A tire designed to operate at higher
loads and at higher inflation pressures
than the corresponding standard tire.
Section width The linear distance between the
exteriors of the sidewalls of an inflated
tire, excluding elevations due to
labeling, decoration, or protective
bands.
Sidewall The portion of a tire between the
tread and bead.
Sidewall
separation
The parting of the rubber compound
from the cord material in the sidewall.
Snow tire A tire that attains a traction index
equal to or greater than 110, compared
to the ASTM E1136-93 (re-approved
2003, incorporated by reference, see
§571.5) Standard Reference Test Tire
when using the snow traction test as
described in ASTM F1805-00
(incorporated by reference, see
§571.5), and that is marked with an
Alpine Symbol
specified in S5.5(i) on
at least one sidewall.
Test rim The rim on which a tire is fitted for
testing, and may be any rim listed as
appropriate for use with that tire.
Tread The portion of a tire that comes into
contact with the road.
Tread rib A tread section running around the
circumference of a tire.
Tread
separation
The pulling away of the tread from the
tire carcass.
Tread wear
indicators
(TWI)
The projections within the principal
grooves designed to give a visual
indication of the degrees of wear of
the tread.
Wheel-
holding
fixture
The fixture used to hold the wheel and
tire assembly securely during testing.
Wheels and Tires
207Specifications
To Next Page
Loading...
