METHOD FOR MANUFACTURING BEAD MEMBER
DRIVE
May 7, 2014
An object is to improve the durability of the stiffener having a hard rubber member and a soft rubber member formed on the radially inner side and the radially outer side by laminating rubber strips. A tire (1) includes bead cores (2), stiffeners (3) provided on the outer circumferences of the bead cores (2), and a carcass ply (4). Ends (4A) of the carcass ply (4) are disposed on the stiffeners (3). Each stiffener (3) includes an inner rubber portion (3A) on the radially inner side, an outer rubber portion (3B) on the radially outer side, and a cover tape (3C). The inner rubber portion (3A) is formed by laminating a first rubber strip (R1). The outer rubber portion (3B) is formed by laminating a second rubber strip (R2). The second rubber strip (R2) is composed of rubber having a lower rigidity than the inner rubber portion (3A). The cover tape (3C) covers a part of the stiffener (3) that comes into contact with the end (4A) of the carcass ply (4).
Discussion in the ATmosphere