To disperse tension to each carcass ply group, effectively suppress carcass damage, even in case of use in an overload.

In a bias tire of double bead, a carcass 6 includes a first ply group 21 folded back by a first bend core in a tire axial direction inner side and a second ply group 22 folded back by a second bead core in an outer side. The first ply group 21 is formed by a first carcass ply 21A, 21B arranging a carcass cord at a first cord angle α1 in a range of 39 to 45 degrees. The second ply groove 22 is formed by a second carcass ply 22A, 22B arranging a carcass cord at a second cord angle α2 in a range of 34 to 40 degrees.