Abstract: A mechanical disc brake structure contains: a base, two disc brake units, and a connection block. The base includes at least one elongated fixer, a first receiving space, two first connecting portions, two second receiving spaces, two limiting grooves two connection racks, two through orifices. Each disc brake unit includes a rotation portion, multiple first balls, a first circular disk, a second circular disk, an affix element, and a first cap. The connection block includes a first aperture configured to correspond to the second hole of the rotation portion of each disc brake unit so that each of two locking elements is connected with the second hole and the passing aperture; the connection block further includes a second aperture formed on a predetermined position thereof so that the steel cable is inserted into the connector from the second aperture of the connection block.

Abstract: A fitting structure of a bottom bracket shell of a bicycle contains: a hollow body having a receiving orifice. A first engagement element includes a first engaging section, a first aperture, and a first tilted guide portion. A second engagement element includes a second engaging section, a second aperture, and a second tilted guide portion. A first sleeve includes a first accommodation portion, a first connection portion, a first rib, a first abutting portion, and a first coupling section, wherein a first conically inclined face is defined between the first sleeve and the first tilted guide portion. A second sleeve includes a second accommodation portion, a second connection portion, a second rib, a second abutting portion, and a second coupling, wherein a second conically inclined face is defined between the second sleeve and the second tilted guide portion.

Abstract: A fitting structure of a bottom bracket shell of a bicycle contains: a hollow body having a receiving orifice. A first engagement element includes a first engaging section, a first aperture, and a first tilted guide portion. A second engagement element includes a second engaging section, a second aperture, and a second tilted guide portion. A first sleeve includes a first accommodation portion, a first connection portion, a first rib, a first abutting portion, and a first coupling section, wherein a first conically inclined face is defined between the first sleeve and the first tilted guide portion. A second sleeve includes a second accommodation portion, a second connection portion, a second rib, a second abutting portion, and a second coupling, wherein a second conically inclined face is defined between the second sleeve and the second tilted guide portion.

Abstract: A mechanical disc brake structure contains: a base, two disc brake units, and a connection block. The base includes at least one elongated fixer, a first receiving space, two first connecting portions, two second receiving spaces, two limiting grooves two connection racks, two through orifices. Each disc brake unit includes a rotation portion, multiple first balls, a first circular disk, a second circular disk, an affix element, and a first cap. The connection block includes a first aperture configured to correspond to the second hole of the rotation portion of each disc brake unit so that each of two locking elements is connected with the second hole and the passing aperture; the connection block further includes a second aperture formed on a predetermined position thereof so that the steel cable is inserted into the connector from the second aperture of the connection block.

Abstract: An angle adjustable quick release contains: a connection post, a fixing holder, a rotatable controller, a press knob, a screw bolt, a return spring, and a screw nut. The connection post includes a hollow extension, a first locking ring, a second locking ring, a circular toothed loop, and a second C-shaped notch. The fixing holder includes a through orifice, a peripheral rib, and a third C-shaped notch. The rotatable controller includes a hollow cylinder, a second accommodation groove, a locking shoulder, a first toothed protrusion, and an operation trench. The press knob includes a driving section, a stop projection, a second toothed protrusion, and an arcuate hole. The screw bolt is housed in the first accommodation groove and is locked in the screwing aperture through the return spring and a C ring, and the C ring is locked in the first C-shaped notch.

Abstract: An adjustment structure of a Presta valve for a bicycle tire contains: an outer stem, a reinforcement stem, and a fitting sleeve. The outer stem includes a flat extension extending outward from a bottom of the outer stem, and the outer stem includes a coupling portion formed on the bottom of the outer stem. The reinforcement stem includes a hollow portion defined in the reinforcement stem, and the reinforcement stem includes a female threaded portion arranged on an inner wall of a bottom of the reinforcement stem. The fitting sleeve includes multiple ribs arranged on an upper end of an outer wall of the fitting sleeve. Furthermore, the fitting sleeve further includes a recess defined on a lower end of the outer wall thereof so as to retain with the flat extension of the outer stem.

Abstract: An angle adjustable quick release contains: a connection post, a fixing holder, a rotatable controller, a press knob, a screw bolt, a return spring, and a screw nut. The connection post includes a hollow extension, a first locking ring, a second locking ring, a circular toothed loop, and a second C-shaped notch. The fixing holder includes a through orifice, a peripheral rib, and a third C-shaped notch. The rotatable controller includes a hollow cylinder, a second accommodation groove, a locking shoulder, a first toothed protrusion, and an operation trench. The press knob includes a driving section, a stop projection, a second toothed protrusion, and an arcuate hole. The screw bolt is housed in the first accommodation groove and is locked in the screwing aperture through the return spring and a C ring, and the C ring is locked in the first C-shaped notch.

Abstract: A hydraulic brake is used to a handle of a two wheel vehicle and contains a body including two first tabs, the handle including an axial hole and a through bore to receive an adjustable nut having a screw aperture to be screwed with first threads of a connecting post of a hydraulic piston, the body including a retaining sleeve and two second tabs, a hydraulic cylinder including an oil chamber and fitted to a holder, a positioning nut having an orifice screwed with second threads of the hydraulic cylinder, the holder including a receiving room to receive an oil cup, a pore, and a cover, an outer diameter of the pore of the holder being equal to that of the hydraulic cylinder, the hydraulic piston including the connecting post, and the connecting post including the first threads to screw the connecting post with the orifice of the positioning nut.

Abstract: An adjustable quick release grip contains: a handlebar, a central shaft, a quick releasing shaft, a plurality of steel balls, plural springs, a returning spring, an adjusting seat, and a screw nut. The handlebar includes a spherical knob, a groove, an eccentric hole, a pulling lever, and a connecting stem. The quick releasing shaft includes a hollow body with an outer screwing section, and the hollow body has a slot, an aperture, a stopping rim, an opening, a retaining head, and a shoulder, wherein the retaining head has a plurality of receiving holes. The adjusting seat includes an adjustment cover, a first forcing ring, a second forcing ring, a pore, a notch, and a circular gasket, the notch has inner threads arranged around an inner wall thereof, wherein the adjustment cover has an external screw section surround around a bottom end thereof and screwed with the inner threads.

Abstract: An adjustable quick release grip contains: a handlebar, a central shaft, a quick releasing shaft, a plurality of steel balls, plural springs, a returning spring, an adjusting seat, and a screw nut. The handlebar includes a spherical knob, a groove, an eccentric hole, a pulling lever, and a connecting stem. The quick releasing shaft includes a hollow body with an outer screwing section, and the hollow body has a slot, an aperture, a stopping rim, an opening, a retaining head, and a shoulder, wherein the retaining head has a plurality of receiving holes. The adjusting seat includes an adjustment cover, a first forcing ring, a second forcing ring, a pore, a notch, and a circular gasket, the notch has inner threads arranged around an inner wall thereof, wherein the adjustment cover has an external screw section surround around a bottom end thereof and screwed with the inner threads.

Abstract: A multiple sprocket assembly includes a number of sprockets attached to a hub of a bicycle frame, and a rear chain transfer device having a sliding member slidably attached to a guiding device, and a carrier attached to the sliding member and movable relative to the sprockets for engaging with a chain and for carrying and moving the chain onto the teeth of the sprockets, the rear chain transfer device includes a support attached to the bicycle frame, and the guiding device is secured to the support, the guiding device includes one or more tracks or channels for slidably engaging with and for guiding the sliding member to move relative to the guiding device.

Abstract: A brake cable combination includes a cable member having an end member at one end portion, a coupler for one type bicycle having an orifice for engaging with the cable member and an enlarged socket opening for engaging with the end member of the cable member, and another coupler for another type bicycle having an orifice for selectively engaging with the cable member, and an enlarged socket opening for selectively receiving and engaging with the end member of the cable member and for allowing the cable member to be easily and quickly and readily attached or mounted or secured or coupled to the brake handles of different cycles or bicycles.

Abstract: A rear derailleur is adapted to be secured to a side of a rear fork portion of a vehicle frame. When the front derailleur pull tight or release a transmission cable, a transmission lever is move back and forth in a threaded shaft base and a foot portion of a lever control cable also pulls a chain retaining lever to rotate, so that a position of a distal point of the rotating chain retaining lever resulting from a movement of a retracing spring is changed. Accordingly, effects such as gear shift-up, gear fixing, gear shift-down, and angle adjusting of chain retaining steering wheel are achieved. In addition, occurrence of disorder of the derailleur system and slipping off of the chain are reduced.

Abstract: A shifter is fixed on a handle of a bicycle and connected with a rear speed changer of a cable and contains: a body, a first bar, and a speed changing mechanism, the body including the first bar, a chamber to receive the speed changing mechanism, and two tabs, and each tab including a first hole, and the body including a first aperture arranged on a top end thereof and communicating with the chamber to insert the cable into the chamber via the first aperture so as to connect with a first seat, the body including a first retaining ring, the chamber including a first positioning pillar, an axial shaft, a second aperture, and a first returning spring, the first positioning pillar being provided to fix a first fixing piece in the chamber, and the axial shaft being used to axially position a first hook in the chamber.

Abstract: A bicycle wheel balance machine includes a base having two spaced arms for engaging with a bicycle wheel, a casing slidably engaged in one of the arms and having a center member movable to engage with a wheel hub with an anchoring device, a spindle rotatably engaged in the other arm and engaged with the wheel hub, a motor coupled to the spindle for rotating the spindle and the bicycle wheel, two sensors attached to the arms for sensing conditions of the bicycle wheel, and the bicycle wheel balance machine includes a simplified structure to be easily operated by the users themselves at home.

Abstract: A connecting and adjusting structure for a crank assembly used in a bicycle contains a first tube of a first connector including a first hollow portion, the first connector including a first bearing seat to receive a first ball bearing, the first bearing seat includes a first engaging tab, a first adjusting rib, and the first tube, a second connector including a second bearing seat to receive a second ball bearing, a dustproof cover, and a retaining ring, the second bearing seat including a second engaging tab, a second adjusting rib, and a second tube, a second crank including a central shank with plural T-shaped teeth and second internal screws, a first crank including a hollow post with a Tee groove fixed to engage with the T-shaped teeth, and a screw is inserted through the hollow post to be screwed with the second internal screws.

Abstract: A rear derailleur is adapted to be secured to a side of a rear fork portion of a vehicle frame. When the front derailleur pull tight or release a transmission cable, a transmission lever is move back and forth in a threaded shaft base and a foot portion of a lever control cable also pulls a chain retaining lever to rotate, so that a position of a distal point of the rotating chain retaining lever resulting from a movement of a retracing spring is changed. Accordingly, effects such as gear shift-up, gear fixing, gear shift-down, and angle adjusting of chain retaining steering wheel are achieved. In addition, occurrence of disorder of the derailleur system and slipping off of the chain are reduced.