Pneumatic radial tire for heavy load vehicles

A pneumatic radial tire for heavy load vehicles comprising a carcass composed of ply cords lying in a radial plane of the tire or forming a very small angle with said plane and a belt for reinforcement of said carcass including tension members composed of at least two rubberized metal cords crossing with each other at a cord angle of not more than 25.degree. with respect to the equatorial plane of the tire, characterized by coating said metal cords of said tension members with a rubber having a modulus of elasticity of 40-80 Kg/cm.sup.2, and by widening a distance W between the cords in each of said tension members to 0.2-0.75 d based on a diameter d of said metal cord, and by uniformly shortening an interlaminar cord distance D between said tension members to 0.2-0.4d at a central region extending within 50-80% of a superposed width of said tension members, and by gradually separating said tension members with respect to each other from said central region toward both edges thereof.