| 摘要 |
There is provided a brake disc in a disc brake for a vehicle, which can be manufactured lightweight, suppress the thermal deformation and is effective to prevent the brake noises. This brake disc ( 2 ) is supported by a wheel 4 through a plurality of support members ( 10 ) and is operable to exert a braking force when sandwiched by frictional pads ( 8, 8 ). The brake disc ( 2 ) has an outer peripheral face ( 2 b) formed with a plurality of outer recesses ( 11 ) deploying in a circumferential direction. Accordingly, the radial width (f) of the braking surfaces ( 9 ), with which the frictional pads ( 8 ) is engageable, varies in a direction circumferentially thereof.
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