The B. F. Goodrich Company

The Uniroyal Goodrich Tire Company

Paul C Staab

Shamim Ahmad

Larry A Kraus

A high performance passenger tire features improved bead assemblies. The bead assemblies include a split ply formed of two short insert plies of rubberized steel cords bent around the bead cores with their inside ends extending radially outwardly from the bead cores a distance greater than the distance from their outside ends to the bead cores. The cords of the insert plies form low angles with respect to the circumferential center line of said tire. The bead assemblies have extended utility when utilized in high performance belted radial pneumatic tires.

High performance passenger tire

A predominantly styrene-butadiene copolymer rubber (SBR) tire tread compound may be reinforced with a special high structure carbon black designated herein as a N103, having a relatively high volatiles content (as indicated by its iodine number), and a superfine particle size smaller than about 20 nanometers (nm), a DBPA greater than 120 cm.sup.3 /100 g carbon black, and an I.sub.2 No in the range from 130-160 mg/g, in an oil extended tread compound in which there is at least 30 parts of processing oil per 100 parts of rubber; the presence of this N103 black in a major amount relative to the total amount of high structure black, is essential.

Growing community of inventors

Akron, OH, United States of America

Paul C Staab