Abstract: A micro-adjusting device of the bicycle brake holder is composed of a cap, an adjusting seat, a ferrule, an elastic body, and an adjustment bolt. The cap is mounted on the adjusting seat which is engaged with the ferrule fastened with the bicycle brake holder. The elastic body has a horizontal end which is fastened with the cap, and a vertical end which is received in a through hole of the head of the adjustment bolt. The adjustment bolt has a threaded body which is adjustably located in an adjustment slot of the bicycle brake holder. The adjustment bolt is securely located at a position in the adjustment slot of the bicycle brake holder by a fastening nut which is engaged with the threaded body of the adjustment bolt.

Abstract: A micro-adjusting device of a bicycle brake holder is composed of a cap, an adjusting piece, an adjusting seat, an elastic body, a ferrule fastened with the bicycle brake holder, and an adjusting bolt. The adjusting seat is engaged with the cap via the adjusting piece. The elastic body has a horizontal end which is located in an arcuate recess of the adjusting seat, and a vertical end which is located in a notch of the adjusting seat. The microadjustment of the bicycle brake holder is attained by rotating the adjusting bolt to bring about a displacement of the adjusting piece so as to cause the horizontal end of the elastic body to displace in the arcuate recess of the adjusting seat.