Reinforced construction of bead portions of radial tires for heavy load vehicles

摘要: A reinforced construction of bead portions radial tires for heavy load vehicles such as trucks, buses etc., which is well balanced in rigidity and has an excellent durability disclosed. The includes a first reinforcing layer second layer, the being substantially continuously extended from height covering both upper ends turned-up portion carcass ply to inside surface ply, interposed between axially said disposed along having end whose h 1 base given by h.sub.1 =(0.8 2.5)h.sub.0 where o composed at least two layers cords are inclined on circle formed with respect direction tire angle 40° 75°, outside covers including one layer.