Patent ID: 7735534

Claim:
A heavy duty pneumatic tire comprising a tread having an external surface to form a tread surface, a pair of sidewalls extending almost inward in a radial direction from each end of the tread, a pair of beads positioned almost inward of the sidewalls in the radial direction, a carcass laid between both of the beads along insides of the tread and the sidewalls and having a radial structure, a belt positioned between the tread and the carcass, and a hard rubber layer, the belt having a first ply, a second ply and a third ply positioned between the first ply and the second ply, the first ply and the second ply including a cord which is formed by a non-extensible material and has an absolute value of an angle to a circumferential direction being 10° or greater and 45° or less, an inclination of the cord of the first ply to the circumferential direction being reverse to an inclination of the cord of the second ply to the circumferential direction, the third ply including a cord substantially extending in the circumferential direction, a width of the third ply being smaller than those of the first ply and the second ply, and being 75% or greater of a width of the tread, and the hard rubber layer having a complex elastic modulus of 30 MPa or greater and 80 MPa or less and being positioned outward of the third ply in an axial direction and between the first ply and the second ply.