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Safety
Tire Safety
The linear distance between the exteriors of the sidewalls of an inflated tire, including elevations due to
labeling, decorations, or protective bands or ribs.
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.
Production options weight
The combined weight of those installed regular production options weighing over 2.3 kilograms (5 lbs.) in
excess of those standard items which they replace, not previously considered in curb weight or accessory
weight, including heavy duty brakes, ride levelers, roof rack, heavy duty battery, and special trim.
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.
Recommended inflation pressure
This is the inflation pressure provided by the vehicle manufacturer on the Tire Information label and on the
Certification / VIN tag.
Reinforced tire
A tire designed to operate at higher loads and at higher inflation pressures than the corresponding standard
tire.
Rim
A metal support for a tire or a tire and tube assembly upon which the tire beads are seated.
Rim diameter
This means the nominal diameter of the bead seat.
Rim size designation
This means the rim diameter and width.
Rim type designation
This means the industry of manufacturer’s designation for a
rim by style or code.
Rim width
This means the nominal distance between rim flanges.
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.
Special Trailer (ST) tire
The "ST" is an indication the tire is for trailer use only.
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
Summary of Contents for 500-95500-00
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