PURPOSE: To correct or prevent the deformation of tread shoulder in a molding process, by breadthwise dividing the second belt from the inner side layer into two at the almost center in the width direction, in a radial tire in which three or more belt layers are arranged on the external side of a carcass ply.
CONSTITUTION: In three or more belt layers B made of steel chords or the like covered with topping rubber at the external side of a carcass ply 1 in a tread 4, the indicated tire in which 1st.-4th. belts B1-B4 are arranged in turn from the inner layer side for instance, the chord angle of the first belt Bl is 15-65° against the crown center C of the circumferential direction of tire and the chord angle of the second and third belts B2, B3 is 15-25° Respective layers are arranged to cross with each other in alternately different directions. In this case, the second belt B2 receiving a large tension as a hoop is divided into two in the crown center C and the divided belts b1, b2 are arranged so as to be adjacently positioned in a butt-jointed state at the center C.
MIZUTANI HIROSHI
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