Abstract: A tread for a unidirectional pneumatic tire has first, second and third circumferentially extending zones. The edges of the zones are parallel to the equatorial plane of the tire. The width of the first zone is between 25% and 50% of the tread width, the width of the second zone is between 15% and 35%, and the width of the third zone is between 25% and 50%. The first zone has substantially aligned lateral wide groove segments extending across the width of the first zone. The segments form an angle between 70 and 90 degrees with a plane in the first zone parallel to the equatorial plane. The second zone has substantially aligned lateral wide groove segments extending across the width of the second zone. The segments form an angle between 10 and 45 degrees with a plane in the second zone parallel to the equatorial plane.

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.