Tire related term Meaning
Pneumatic tire A mechanical device made of rubber,
chemicals, fabric and steel or other materi-
als, 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 descri-
bed in ASTM F-1805-00, Standard Test
Method for Single Wheel Driving Traction
in a Straight Line on Snow-and Ice-Cov-
ered 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
Tread That portion of a tire that comes into con-
tact with the road
Tread rib A tread section running circumferentially
around a tire
10-1. Specifications
735
10
Vehicle specifications
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