Abstract: A carbon fiber rim contains: a body, two clamping pieces, and a plurality of covering layers. The body includes a recessed fixing face defined on an outer diameter thereof so as to fix a tire and two connecting faces formed on two sides thereof so as to align with the two clamping pieces, and each clamping piece is a circular loop and corresponds to a profile of an outer peripheral side of the body. The plurality of covering layers are fitted and surround around the body and the two clamping pieces. Thereby, the two clamping pieces are fixed on the two connecting faces of the body by using the plurality of covering layers so that the two brake blocks do not contact with the body directly and brake a bicycle wheel via the two clamping pieces.

Abstract: A saddle rear rack for a bicycle contains a body, a connector, and two coupling sets. The body is in a frame shape and includes an accommodating cavity, two tabs, and two polygonal recesses. The connector is fixed between the two tabs and includes two hanging bars for hanging the connector on two stems of a bottom end of a saddle, and the connector also includes two toothed notches. Each coupling set includes a fixing element, a limiting element, and a screw bolt. The fixing element a polygonal surrounding section for corresponding to each polygonal recess and a toothed surrounding section for inserting into and engaging with each toothed notch. The limiting element has a circular disc and a circular peg corresponding to the toothed surrounding section of the fixing element, and the screw bolt is screwed with and unscrewed from the fixing element and the limiting element.

Abstract: A carbon fiber rim contains: a body, two clamping pieces, and a plurality of covering layers. The body includes a recessed fixing face defined on an outer diameter thereof so as to fix a tire and two connecting faces formed on two sides thereof so as to align with the two clamping pieces, and each clamping piece is a circular loop and corresponds to a profile of an outer peripheral side of the body. The plurality of covering layers are fitted and surround around the body and the two clamping pieces. Thereby, the two clamping pieces are fixed on the two connecting faces of the body by using the plurality of covering layers so that the two brake blocks do not contact with the body directly and brake a bicycle wheel via the two clamping pieces.

Abstract: A saddle rear rack for a bicycle contains a body, a connector, and two coupling sets. The body is in a frame shape and includes an accommodating cavity, two tabs, and two polygonal recesses. The connector is fixed between the two tabs and includes two hanging bars for hanging the connector on two stems of a bottom end of a saddle, and the connector also includes two toothed notches. Each coupling set includes a fixing element, a limiting element, and a screw bolt. The fixing element a polygonal surrounding section for corresponding to each polygonal recess and a toothed surrounding section for inserting into and engaging with each toothed notch. The limiting element has a circular disc and a circular peg corresponding to the toothed surrounding section of the fixing element, and the screw bolt is screwed with and unscrewed from the fixing element and the limiting element.