Patent ID: 7011127

Claim:
A tire for heavy load use, comprising a carcass ply which is made of at least one sheet of steel cords and includes a toroidal-shaped ply main portion extending between a pair of bead cores and ply turn-up portions that continue from the ply main portion and that are turned up around the bead cores from inside to outside in a tire axial direction, wherein each ply turn-up portion includes a turn-up main portion, which is bent along an inside surface of the bead core in an tire axial direction, an inner surface thereof in a radial direction and an outside surface thereof in the tire axial direction, and a turn-up sub-portion that continues from the turn-up main portion and that extends to separate from the bead cores, wherein the turn-up sub-portion extends in an inclined manner with respect to the ply main portion at an angle θ, that is less than 90°, with respect to an outer surface of the bead core in the tire radial direction, and wherein steel cords of the turn-up sub-portion includes piercing steel cords that pass through the steel cords of the ply main portion.