Abstract: A bicycle wheel quick release device capable of being combined with a tool has a quick release assembly and a handle. The quick release assembly has a shaft, an axial hole, and a cap. The cap has a receiving groove communicating with the axial hole. The handle is capable of being received in the axial hole and the receiving groove and has at least two tool portions. Any one of the at least two tool portions is capable of being combined with a threaded component to screw or unscrew the threaded component onto or from an object. Thereby, the handle is a multifunctional tool that can be used not only as a wrench for detaching or mounting the quick release assembly from or onto a bicycle frame but also as a wrench for other threaded components.

Abstract: A self-sealing hydraulic device has a connecting assembly and a hydraulic assembly. The connecting assembly has an adaptor having a shell, a male fitting, and a barb fitting. The male fitting is mounted in the shell, is axially moveable relative to the shell, and has an axial hole and a radial hole orthogonally communicating with the axial hole. The radial hole is sealed by the shell. The barb fitting is connected to and communicates with both the shell and a hose. The hydraulic assembly is assembleable to the connecting assembly and has a housing, an elastic element, and a valve unit. The housing has a hydraulic chamber and an assembling hole communicating with the hydraulic chamber via a through hole. The elastic element is disposed in the housing. The valve unit is disposed inside the hydraulic chamber and driven by the elastic element to seal the through hole.

Abstract: A seatpost has a post body, an adjusting mount, a connecting unit, and a connecting bracket. The post body has a supporting base disposed at an upper end of the post body. The supporting base has a bore formed through a rear end of the supporting base. The adjusting mount is connected to the supporting base and has a passing hole disposed at a rear end of the adjusting mount. The connecting unit is connected to the adjusting mount and has a connecting portion having a threaded hole. A bolt passes through the bore, the passing hole, and is screwed with the threaded hole. The connecting bracket has a front end connected to the connecting portion, a rear end opposite the front end, and an assembling board disposed at the rear end of the connecting bracket for assembling a taillight or a bicycle license plate.

Abstract: A bike brake lever with an adjustable sensor device includes a main body and a sensor device. The main body has a symmetry plane longitudinally defined through the main body and a pivot seat mounted on the main body and located along the symmetry plane. The sensor device is rotatably connected with the pivot seat of the main body and has a pivot portion rotatably connected with the pivot seat and a detecting portion connected with the pivot portion. The sensor device of the bike brake lever is adjustable for position switch. The bike brake lever is universal for both sides of a bike, meets the user's demand, and also reduces the manufacture cost.

Abstract: A disk brake device has a first component, a universal set, and a second component. The first component has a first assembling hole axially formed through the first component. The universal set is mounted in the first assembling hole and has a base having a supporting protrusion and a first clutch. The first clutch has a fixed plate and a movable plate. The fixed plate has a flange embedded in and fixed to the first assembling hole. The movable plate is capable of axially reciprocating and has a feeding shaft and a recess. The feeding shaft is mounted through the fixed plate. The recess is mounted on the supporting protrusion and contacts the supporting protrusion in a point-contact relationship. The second component is fastened to the first component and has a second assembling hole formed through the second component and assembled by a second clutch.

Abstract: A bike brake lever with an adjustable sensor device includes a main body and a sensor device. The main body has a symmetry plane longitudinally defined through the main body and a pivot seat mounted on the main body and located along the symmetry plane. The sensor device is rotatably connected with the pivot seat of the main body and has a pivot portion rotatably connected with the pivot seat and a detecting portion connected with the pivot portion. The sensor device of the bike brake lever is adjustable for position switch. The bike brake lever is universal for both sides of a bike, meets the user's demand, and also reduces the manufacture cost.

Abstract: A bicycle rear derailleur has a mounting base, a moveable base, and a friction assembly. The moveable base has an axle. The friction assembly is mounted in the moveable base and has a driving disk, a driven disk, multiple rotating members, and a friction member. The driving disk is connected with the axle in a non-rotatable manner. The driven disk is rotatably and axially moveably mounted in the moveable base. Each disk has multiple curved rotating member guiding recesses. Each rotating member guiding recess of the driving disk has a depth decreased along a first rotating direction. Each rotating member guiding recess of the driven disk has a depth decreased along a second rotating direction. The rotating members are mounted respectively in the rotating member guiding recesses. The friction member is mounted in the moveable base in a non-rotatable manner and abuts the driven disk.

Abstract: A clamping device for a bicycle saddle has a seat post and a clamping assembly. The seat post has a post head having a head hole. The clamping assembly has two clamping bases, two clamping caps, and a clamping bolt assembly. Each clamping base has a clamping block, a threaded hole, and a rod clamping recess. The clamping caps are attached respectively to the outer sides of the clamping bases, and each clamping cap has a bolt hole and a rod clamping recess corresponding in position to the rod clamping recess of a corresponding one of the clamping bases. The clamping bolt assembly has a fixing bolt, a fixing sleeve screwed with the fixing bolt, and a spring. The fixing bolt and the fixing sleeve are mounted respectively through the bolt holes in the clamping caps and the through holes in the clamping bases.

Abstract: A bicycle rear derailleur has a mounting base, a moveable base, and a friction assembly. The moveable base has an axle. The friction assembly is mounted in the moveable base and has a driving disk, a driven disk, multiple rotating members, and a friction member. The driving disk is connected with the axle in a non-rotatable manner. The driven disk is rotatably and axially moveably mounted in the moveable base. Each disk has multiple curved rotating member guiding recesses. Each rotating member guiding recess of the driving disk has a depth decreased along a first rotating direction. Each rotating member guiding recess of the driven disk has a depth decreased along a second rotating direction. The rotating members are mounted respectively in the rotating member guiding recesses. The friction member is mounted in the moveable base in a non-rotatable manner and abuts the driven disk.

Abstract: A bicycle saddle has a seat post, an adjustment base, a seat, a sliding base, and two adjusting bolts. The seat post has a supporting base having a concave top surface and a passage. The adjustment base is attached to the concave top surface of the supporting base and has a convex bottom surface and an elongated through hole. The convex bottom surface matches and abuts the concave top surface of the supporting base. The seat is attached to the flat top surface of the adjustment base and has a sliding channel. The sliding base is mounted slidably in the sliding channel and has a slot and two holding rods respectively provided with a threaded hole. The adjusting bolts are mounted through the passage, the elongated through hole, and the slot, and are screwed respectively with the threaded holes in the holding rods.

Abstract: A bicycle saddle has a seat post, an adjustment base, a seat, a sliding base, and two adjusting bolts. The seat post has a supporting base having a concave top surface and a passage. The adjustment base is attached to the concave top surface of the supporting base and has a convex bottom surface and an elongated through hole. The convex bottom surface matches and abuts the concave top surface of the supporting base. The seat is attached to the flat top surface of the adjustment base and has a sliding channel. The sliding base is mounted slidably in the sliding channel and has a slot and two holding rods respectively provided with a threaded hole. The adjusting bolts are mounted through the passage, the elongated through hole, and the slot, and are screwed respectively with the threaded holes in the holding rods.

Abstract: A clamping device for a bicycle saddle has a seat post and a clamping assembly. The seat post has a post head having a head hole. The clamping assembly has two clamping bases, two clamping caps, and a clamping bolt assembly. Each clamping base has a clamping block, a threaded hole, and a rod clamping recess. The clamping caps are attached respectively to the outer sides of the clamping bases, and each clamping cap has a bolt hole and a rod clamping recess corresponding in position to the rod clamping recess of a corresponding one of the clamping bases. The clamping bolt assembly has a fixing bolt, a fixing sleeve screwed with the fixing bolt, and a spring. The fixing bolt and the fixing sleeve are mounted respectively through the bolt holes in the clamping caps and the through holes in the clamping bases.

Abstract: An oil pipe connection device has a base, an oil pipe, a pipe connector and a securing nut. The base has a connection hole and an abutting shoulder. The pipe connector is mounted in the connection hole and has a tapered head, an insertion segment, a pressing collar and an engaging recess. The tapered head abuts with the abutting shoulder. The insertion segment is inserted tightly into an end of the oil pipe. The pressing collar is around the insertion segment and has an inclined guiding surface. The engaging recess is formed between the pressing collar and the insertion segment and holds the end of the oil pipe inside. The securing nut is mounted around the oil pipe, is connected with the connection hole in a threaded manner and has an inclined guiding surface abutting with the inclined guiding surface on the pressing collar.

Abstract: An oil pipe connection device has a base, an oil pipe, a pipe connector and a securing nut. The base has a connection hole and an abutting shoulder. The pipe connector is mounted in the connection hole and has a tapered head, an insertion segment, a pressing collar and an engaging recess. The tapered head abuts with the abutting shoulder. The insertion segment is inserted tightly into an end of the oil pipe. The pressing collar is around the insertion segment and has an inclined guiding surface. The engaging recess is formed between the pressing collar and the insertion segment and holds the end of the oil pipe inside. The securing nut is mounted around the oil pipe, is connected with the connection hole in a threaded manner and has an inclined guiding surface abutting with the inclined guiding surface on the pressing collar.

Abstract: A hydraulic brake lever includes a body having a bladder chamber, a cavity and a flexible separator mounted between the bladder chamber and the cavity. The flexible separator holds hydraulic oil in a front section of the body and prevents a rear section of the body from contacting with the pressurized hydraulic oil. A cylinder is mounted in the cavity of the body and accommodates a piston set. Thus, a high pressure is kept in the cylinder and is not applied directly on the body. Due to the separating design, the hydraulic oil applied a low pressure on the body. Thus, manufacturing the body is less limited and a manufacturing cost is reduced.

Abstract: A hydraulic brake lever includes a body having a bladder chamber, a cavity and a flexible separator mounted between the bladder chamber and the cavity. The flexible separator holds hydraulic oil in a front section of the body and prevents a rear section of the body from contacting with the pressurized hydraulic oil. A cylinder is mounted in the cavity of the body and accommodates a piston set. Thus, a high pressure is kept in the cylinder and is not applied directly on the body. Due to the separating design, the hydraulic oil applied a low pressure on the body. Thus, manufacturing the body is less limited and a manufacturing cost is reduced.

Abstract: An adjustment assembly for securing a bicycle seat includes a base adapted to be mounted on top of a seat post and having an arcuate rail formed on two opposed sides of the base, two adjusting seats oppositely and slidably connected to the base. Each adjusting seat has an arcuate track to receive therein a corresponding one of the arcuate rail of the base such that the two adjusting seats are movable relative to the base after the two arcuate rails of the base are received in the corresponding arcuate tracks of the adjusting seats and the bicycle seat sandwiched between the two adjusting seats is able to move along with the two adjusting seats relative to the base to accomplish angle change purpose and a securing element extending through the two adjusting seats to threadingly connect to a nut for securing the bicycle seat sandwiched between the two adjusting seats.