Patent ID: 7810534

Claim:
A pneumatic tire comprising a carcass ply extending between beads, at least two belt plies being provided radially outwardly of the carcass ply in a tread, the at least two belt plies having reinforcing cords arranged obliquely with respect to a circumferential direction of the tire, a belt cover ply covering the at least two belt plies, the belt cover ply having a main belt cover section disposed radially outwardly of the at least two belt plies and belt cover extension sections separate from the main belt cover section and disposed radially inward and on each side of the main belt cover section, the main belt cover section having a reinforcing cord that extends in the circumferential direction of the tire and is covered with coating rubber, the belt cover extension sections extending beyond edges of one of the at least two belt plies having a maximum belt width, the belt cover extension sections extending more than 10 mm axially of the tire therefrom, the belt cover extension sections having reinforcing cords that extend in the circumferential direction of the tire and are covered with coating rubber, wherein the coating rubber of at least the belt cover extension sections of the belt cover ply is formed of rubber having a tan delta at a temperature of 60° C. that is equal to or less than 0.1, and a ratio h/SH of a tire radial-direction length h between outer edges of the belt cover extension sections and the edges of the belt ply having the maximum belt width to a tire section height SH is equal to or less than 1.5/100, wherein axially inner ends of the belt cover extension sections are disposed radially inward of one or more of the at least two belt plies and the belt cover extension sections are not attached to the main belt cover section, and wherein the tread has an under tread rubber layer placed radially outwardly of the belt cover ply, a cap tread rubber layer disposed radially outwardly of the under tread rubber layer, and wing chip rubber layers placed so as to cover opposite edges of each of the under tread rubber layer and cap tread rubber layer and the outer edges of the belt cover extension sections, an intersection C′ of a normal line drawn to the carcass ply from the edge of the cap tread rubber layer with the carcass ply being located inwardly of an intersection A′ of a normal line drawn to the carcass ply from the outer edge of the belt cover extension section with the carcass ply in the widthwise direction of the tire.