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6-1. Specifications
6
Vehicl
e sp
ecification
s
Tire related term
Meaning
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 centerline 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
That 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-E 1136
Standard Reference Test Tire, when using the
snow traction test as described in ASTM F-1805-
00, Standard Test Method for Signal Wheel Driv-
ing Traction in a Straight Line on Snow-and Ice-
Covered Surfaces, and which is marked with an
Alpine Symbol (
) 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
