Tread for truck tires

B - Operations – Transporting – 60 – C

Patent

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Details

B60C 11/00 (2006.01) B29D 30/56 (2006.01) B60C 3/04 (2006.01) B60C 11/01 (2006.01)

Patent

CA 2139461

A precured tire tread made of an elastomeric material and suitable for mounting on a prepared steel belted radial truck tire casing is described. The tread is preferably compression molded and has a ground-engaging surface with grooves and an inner tread of minimal thickness. The precured tread has a tread width at a centerline, a center portion and two shoulder portions. Each of the shoulder portions has a first radius curvature R1 and second radius of curvature R2. The first radius of curvature has a center located along a line parallel to the centerline of the precured tread and displaced a distance D1 therefrom. The first radius of curvature R1 is between 125% and 225% of the tread width. The distance D1 is between 10% and 25% of the tread width. The second radius of curvature R2 has a center along a line parallel to the centerline of the precured tread and displaced a distance D2 therefrom. The second radius of curvature R2 is between 5% and 25% of the tread width and the distance D2 is between 30% and 50% of the tread width. The ground-engaging surface of the tread in the shoulder portions is displaced toward the tire's axis of rotation, thereby reducing scuffing of the tread in applications where tires are mounted on an vehicle axle which is subjected to excessive lateral forces. Excessive lateral abrasive forces could occur in any truck with more than one rear drive or idler axle. The forces are more severe, as the number of drive axles increase.

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