Disc brake assembly

A disc brake assembly for a wheeled vehicle including a caliper member mounted on a vehicle body structure in such a manner as to straddle a portion of a rotary brake disc secured for a road wheel of tile vehicle, a friction pad supported on said caliper member to be moved toward and away from one side surface of said brake disc in an axial direction for engagement therewith and disengagement therefrom, said friction pad having a backing plate and at least one shim-after "plate" secured thereto by hanger pins accommodated in elongated holes within the backing plate, the backing plate to be engaged at one side end face thereof with a torque receiving portion of said caliper member in braking operation, and a fluid actuator mounted within said caliper member to press said friction pad against the one side surface of said brake disc,

• wherein a side projection is provided on at least an upper or lower portion of the one side end face of said backing plate for engagement with the torque receiving portion of said caliper member or on at least an upper or lower portion of the torque receiving portion of said caliper member for engagement with tile one side end face of said backing plate or on a side end surface of said at least one shim, said side projection being arranged to apply a rotational force to said backing plate in a rotational direction of said brake disc when engaged with the torque receiving portion of said caliper member or engaged with tile one side end face of said backing plate and the abutment of the hanger pins to the perimeter of the elongated holes assisted by a spring, provide resistance to the rotational force.