Pneumatic radial tires for motorcycles
申请公布号:US4773463(A)
申请号:US19840645186
申请日期:1984.08.29
申请公布日期:1988.09.27
发明人:OKUNI, SHINICHIRO;KITAZAWA, YOICHI
分类号:B60C9/26;B60C9/08;B60C9/18;B60C11/04;B60C15/00;B60C15/06;B60C19/00;(IPC1-7):B60C9/08
主分类号:B60C9/26
摘要:A pneumatic radial tire for motorcycle is disclosed, which comprises a tread, a pair of sidewalls, a carcass composed of at least one rubberized ply containing organic fiber cords arranged in a direction of approximately 90 DEG with respect to the equatorial plane of the tire, and a belt disposed between said tread and said carcass at a width corresponding to a tread width and composed of at least two rubberized plies each containing cords with a modulus of elasticity of at least 600 kg/mm2 arranged at an inclination angle of 15 DEG -30 DEG with respect to the equatorial plane of the tire. In the tire, each end of the carcass is wrapped around a bead ring embedded in each radially inner end portion of the sidewalls toward a direction of the tread to form a turnup portion; a tapered rubber filler extending from an upper part of the bead ring toward the tread direction and having a Shore A hardness of at least 60 DEG , and at least one cord reinforcing layer extending upward from a position near the bead ring along the turnup portion and having an inclination cord angle of 15 DEG -30 DEG with respect to the circumferential direction of the tire are disposed between the carcass and the turnup portion thereof or outside the turnup portion; and at least one of radial heights extending from the bead base to ends in the tread direction of the rubber filler, cord reinforcing layer and turnup portion corresponds to at least 60% of the radial height of the sidewall.
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