| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a strong braking force without making a brake operation part, a master cylinder, and the like, in a large size. SOLUTION: A caliper main body 13 to support movable forward and rearward a caliper 12 to abutt a brake pad to both side surfaces of a disk rotor 10; a first cylinder 14 provided to the caliper main body 13; the first cylinder 14 provided to the caliper main body; a first piston to contact a brake pad to the disk rotor; a second cylinder 15 provided to the caliper main body; and a second piston 17 held elastically in the second cylinder 15 to project its one end to the opposing position to a fork; are provided, and while the first piston is composed of the front side piston holding the brake pad at the front end; and the rear side piston with the section form smaller than the rear end face of the front side; the first cylinder 14 is composed of a small form chamber fitting the rear side piston slidable; and a large form chamber to fit closely the front side piston slidable; and the second cylinder 15 is allowed to communicate thereto.</p> |
