To increase a swing performance by sufficiently assuring a traction at the time of swing while maintaining such advantages as a high-speed stability provided by a parallel cord ply structure.

A band layer 7 disposed on the outside of a carcass 6 is formed by spirally winding a small width band-shaped ply 10 obtained by covering a plurality of band cords 11 formed by twisting a plurality of steel filaments 13 with a topping rubber 12 generally in parallel with the circumferential direction of a tire. The load-elongation curve for the band cord 11 is bent to a smooth curve in an elongation range of 0 to 1.0% without providing a linear portion.