| 摘要 |
A disk brake has a brake piston for biasing pads against a disk. The piston is arranged so that the center of its biasing force is offset toward the disk leading side from the center of frictional surface of the pad. Also, the piston is arranged so that the center of biasing force is offset toward the center of the disk from the line extending in the tangential direction of the disk and passing the center of frictional surface of the pad. In another arrangement, a disk brake has a plurality of brake pistons adapted to bias each pad. One of the brake pistons located at the disk leading side has a greater pressure bearing area than that of the other brake piston at the disk trailing side. The brake pistons are arranged so that the center of biasing force is offset toward the center of the disk from the line extending in the tangential direction of the disk and passing the center of frictional surface of the pad.
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