Abstract: A kickstand for a bicycle includes a support stand, a connector detachably mounted on an upper portion of the support stand, and a quick release device releasably mounted on the connector. The quick release device is releasably locked onto a rear wheel axle of the bicycle to attach the support stand to the rear wheel axle. Thus, the kickstand is mounted on and detached from the rear wheel axle of the bicycle easily and quickly by locking and unlocking the quick release device, thereby facilitating a user mounting and detaching the kickstand.

Abstract: A hub for a bicycle includes a shaft, a hub body, a ratchet wheel, a damper, a drive seat, and a plurality of pawl members. Thus, when the drive seat is rotatable backward, the locking detent of each of the pawl members is detached from the oneway ratchet teeth of the ratchet wheel constantly, so that each of the pawl members will not touch the ratchet wheel to prevent from incurring a noise. In addition, when the drive seat is rotatable backward, the hub body is separated from the drive seat, and rotation of the hub body will not drive the drive seat and the pedal to prevent the pedal from being driven when the hub body is rotated backward.

Abstract: A hub for a bicycle includes a shaft, a hub body, a ratchet wheel, a damper, a drive seat, a plurality of pawl members, and a plurality of elastic plates. The ratchet wheel has a plurality of oneway ratchet teeth. The drive seat has a support base which has a plurality of receiving slots. Each of the pawl members has a locking detent. Thus, when the pedal is driven backward (and the drive seat is rotated backward), each of the pawl members is fully hidden in the respective receiving slot, and the locking detent of each of the pawl members is detached from the oneway ratchet teeth constantly, so that each of the pawl members will not touch the ratchet wheel when the pedal is driven backward to prevent from incurring a noise.

Abstract: A rear hub for a bicycle includes a mandrel, a hub body, a first locking nut, a freewheel, an auxiliary threaded post, and a second locking nut. The mandrel has a primary threaded section and a secondary mounting portion which has a diameter smaller than that of the primary mounting portion. Thus, the secondary mounting portion of the mandrel has a smaller diameter so that the freewheel has a smaller diameter to reduce the tooth number of the driven gear to reduce the tooth number of the chainwheel to reduce the diameter of the chainwheel so as to reduce the whole volume and weight of the bicycle.

Abstract: A hub for a bicycle includes a shaft, a hub body rotatably mounted on the shaft, a drive seat rotatably mounted on the shaft and engaged with the hub body, and a self-lubricating bearing mounted between the drive seat and the shaft. The self-lubricating bearing has a radially and outwardly extending limit flange rested on the drive seat. Thus, the self-lubricating bearing has an inner wall contacting with an outer wall of the shaft completely and an outer wall contacting with an inner wall of the drive seat completely, so that the external force applied on the self-lubricating bearing is distributed evenly and smoothly to prevent the self-lubricating bearing from being distorted or deformed due to a stress concentration, thereby enhancing the lifetime of the self-lubricating bearing.

Abstract: A rear hub for a bicycle includes a shaft, a hub body mounted on the shaft and provided with two spoke mounting portions and a mounting ring, a driven member located beside the mounting ring, a brake disc mounted on the mounting ring, and a drive member engaged with the driven member. Thus, the drive member and the brake disc are located at the same side of the hub body, so that one side of the hub body is provided with the drive member and the brake disc, and the other side of the hub body is disposed at a vacant state to facilitate a rider using the other side of the hub body to have a greater inclined angle without being obstructed by the drive member and the brake disc so as to perform acrobatics easily and smoothly.

Abstract: A bicycle seat includes an upright post, a support base mounted on an upper end of the upright post, a rotation base rotatably mounted on the support base, a seat body movably mounted on the rotation base, a retaining member mounted on the seat body, and two locking bolts in turn extending through the support base, the seat body and the retaining member to clamp the seat body between the rotation base and the retaining member. Thus, after each of the two locking bolts is unscrewed, the seat body is movable forward and backward relative to the upright post so as to adjust the position of the seat, and is rotatable relative to the upright post so as to adjust the inclined angle of the seat.

Abstract: A bicycle frame includes a mandrel, a hub and freewheel assembly, two bearings, two first locking nuts, two fork end members, and two second locking nuts. Thus, when each of the first locking nuts is screwed onto the respective first threaded section of the mandrel and when each of the second locking nuts is screwed onto the respective second threaded section of the mandrel and rested on the respective fork end member, the respective fork end member will not be driven by the respective second locking nut to push the respective first locking nut to prevent the respective bearing from being compressed by the respective first locking nut so as to maintain the normal operation of the respective bearing.

Abstract: A hub for a bicycle includes a shaft, a hub body rotatably mounted on the shaft, a drive seat rotatably mounted on the shaft and engaged with the hub body, and a self-lubricating bearing mounted between the drive seat and the shaft. Thus, the self-lubricating bearing has an inner wall contacting with an outer wall of the shaft completely and an outer wall contacting with an inner wall of the drive seat completely, so that the external force applied on the self-lubricating bearing is distributed evenly and smoothly to prevent the self-lubricating bearing from being distorted or deformed due to a stress concentration, thereby enhancing the lifetime of the self-lubricating bearing.

Abstract: A rear hub for a bicycle includes a shaft, a hub body mounted on the shaft, two races each mounted between the shaft and the hub body, two tapered bearings each mounted between the shaft and a respective race, a protruding pull block mounted on a first end of the shaft and rested on a first tapered bearing, and a locking nut secured on a second end of the shaft and rested on a second tapered bearing. Thus, the user only needs to screw the locking nut onto the shaft to pull the pull block to clamp the tapered bearings and the respective races, so that the rear hub is assembled easily, quickly and conveniently.

Abstract: A hub assembly for a bicycle includes a hub body provided with a mounting portion, a freewheel slidably mounted on the mounting portion of the hub body, and at least one retainer mounted on the mounting portion of the hub body and rested on the freewheel to retain the freewheel on the mounting portion of the hub body to prevent the freewheel from being detached from the mounting portion of the hub body. Thus, the freewheel is slidable on the mounting portion of the hub body to change the position of the freewheel relative to the chainwheel, so that the freewheel is in line with the chainwheel, and the chain is perpendicular to the hub body constantly without incurring deflection.

Abstract: A hub clutch device for a bicycle includes a threaded shaft, a hub, a positioning sleeve, a movable sleeve, an elastic member, a fixing seat, and a plurality of urging balls. Thus, each of the urging balls is moved between a respective one of the adjusting slots of the movable sleeve and a respective one of the adjusting slots of the fixing seat to detach the fixing seat and the movable sleeve from the positioning sleeve, so that when the positioning sleeve and the hub are rotated, the fixing seat is not rotated, so that the freewheel will not be rotated by the wheel when the pedal stops operating.