Abstract: A radial ply pneumatic tire (30) has as asymmetric tread portion (41) having circumferential grooves (50, 51, 52, 53) and diagonal grooves (55, 56) therein. The tread is divided into three axial regions (A, B, C) of equal width, and in each region the net-to-gross ratio is different. The rate of treadwear in the axially outermost regions (A, B) of the tread are substantially equalized by features including varying groove depths and widths, groove paths, and chamfering the edges of block elements (57, 58, 62, 63) of the tread.

Abstract: A radial ply pneumatic tire (30) has as asymmetric tread portion (41) having circumferential grooves (50, 51, 52, 53) and diagonal grooves (55, 56) therein. The tread is divided into three axial regions (A, B, C) of equal width, and in each region the net-to-gross ratio is different. The rate of treadwear in the axially outermost regions (A, B) of the tread are substantially equalized by features including varying groove depths and widths, groove paths, and chamfering the edges of block elements (57, 58, 62, 63) of the tread.

Abstract: A pneumatic tire has a pair of axially-spaced annular tensile members forming a part of each bead. One or more continuous carcass plies extend between the annular tensile members and have lateral edge portions which are folded axially and radially outwardly around one of the annular tensile members. An air-impermeable liner is disposed axially and radially inwardly of the carcass plies. A layer of air-permeable rubber extends from a point axially inward and radially outward of one of the annular tensile members and is folded axially and radially outwardly around one of the annular tensile members such that the layer of air-permeable rubber abuts a rim flange when the tire is mounted. An air-impermeable gum strip is interposed between the layer of air-permeable rubber and the carcass plies such that the gum strip extends from a point radially outward and axially inward of one of the annular tensile members to a point radially beneath such annular tensile member.

Abstract: A vehicle tire (10) has a tread (20) with a plurality of ribs (30,31,32) extending circumferentially about the tread. The ribs each have a pair of lateral edges (48,49;60,61) which comprise edge segments placed end to end to present a zigzag configuration. Each rib has grooves (37,38;39,40) therein which intersect the lateral edges of the respective rib and have varying depths at said lateral edges. Preferably, the tread has an all-season configuration.