6-1. Specifications
Tire related term
Meaning
Overall width
The linear distance between the exteriors of
the sidewalls of an inflated tire, including elevations due to labeling, decorations, or protective
bands or ribs
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 lb. or less.
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 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
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