BIAS PLY PNEUMATIC TIRE TREAD WITH LATERAL NOTCHES

摘要

A bias ply pneumatic tire has a tread with a rib type tread pattern including shoulder ribs at the lateral edges of the tread. The tread has grooves therein, and at each lateral edge of the tread a shoulder portion of the tire extends radially inwardly. Shallow shoulder notches are formed in each of the shoulder portions, and extend radially inwardly from the lateral edges of the tread to a depth which is substantially equal to the depth of the deepest grooves in the tread. The notches are circumferentially spaced by lands, and the ratio of the circumferential widths of the notches to the circumferential widths of the next adjacent lands is between 1:0.8 and 1:1.25.