Abstract: A sprocket mounting carrier has a cylindrical body which on the outside is provided with grooves extending in axial direction. The sprocket mounting carrier has such a shape that both sprockets of a first type and sprockets of a second type can be slid onto it. These sprockets each have a central hole whose bounding wall has cams. The bottoms and side walls of the grooves of the sprocket mounting carrier, in the event of sprockets being present on the sprocket mounting carrier, engage with the cams of the sprockets, so that the sprockets are secured to the sprocket mounting carrier both in radial direction and in tangential direction.

Abstract: An apparatus including a hub shell. The hub shell can include a hub body; a first spoke flange; and a second spoke flange. The first spoke flange and the a second spoke flange can include a fiber reinforced plastic. The fiber reinforced plastic can include fibers having a range of lengths between 0.2 and 3 inches.

Abstract: The present disclosure provides a bicycle hub that provides improved drive line efficiency and bike-to-rider torque feedback. The drive line efficiencies are due to lower rolling resistance resulting from a novel bearing and sprag clutch configuration, a lightweight design, and immediate torque transfer from the cassette drive to the hub body. The bike-to-rider feedback has been improved as the torque transfer is smooth, predictable, and immediate.

Abstract: A protection unit for a driving socket of a hub includes a hub with a driving socket connected to an end thereof and the driving socket has multiple ribs extending axially on the outer surface thereof. At least one protection unit is located between two ribs and has an engaging portion. A cover includes a cover face and two sidewalls so as to form an engaging groove. The engaging portion is engaged with the engaging groove. The three sides of the engaging portion are protected by the cover. The cover can be easily mounted to the ribs by the engagement of the engaging portion and the engaging groove so that the cover does not slip away from the ribs in radial direction.

Abstract: The present invention relates to a rear wheel hub for a bicycle, a rear wheel for a bicycle, and a bicycle. In order to provide a rear wheel hub which, with a further reduction in weight, still allows reliable transmission of force, the hub has a hub body (12), an axle body (14), a first bearing device (16) between the axle body and the hub body, a freewheel body (18) for accommodating at least one sprocket, a second bearing device (20) between the axle body and the freewheel body, and a freewheel arrangement (22) between the freewheel body and the hub body which in a first rotational direction (26) about the rotational axis establishes a coupling between the freewheel body and the hub body, and in a second rotational direction (28) which is opposite that of the first rotational direction, the freewheel body is freely rotatable with respect to the hub body.

Abstract: A hub device for a bicycle includes a hub case which is attached to a center of a wheel for receiving a load exerted from a rim to which a tire is fitted, and formed to have each inner diameter of both end portions larger than a diameter of a center portion, a sleeve with plural slits in a circumferential direction and a cylindrical shape integrally attached to the hub case at the inner diameter side, which serves to transfer the load exerted to the hub case to a shaft, a bearing for receiving the load exerted to the sleeve and rotatably supporting a whole structure of the wheel, a shaft for rotatably supporting the whole structure of the wheel via the bearing, and spherical washers attached to both end portions of the shaft.

Abstract: A hub, in particular for bicycles having a hub shell and two bearings received therein on bearing seats for rotatably supporting relative to a through axle, wherein the two bearings are retained at a defined axial distance by means of a sleeve. A radial spacer device is provided to reduce radial play of the sleeve in the hub shell and to facilitate inserting the through axle.

Abstract: A bicycle hub assembly includes a hub axle, a hub shell, a bearing unit, a retaining member, a lock member and an intermediate member. The bearing unit has a first ring that is coupled to the hub axle, a second ring that is coupled to the hub shell, and a plurality of rollers that is disposed between the first and second rings. The retaining member is coupled to the first ring and retains an axial position of the first ring with respect to the hub axle. The retaining member includes a first attachment face. The lock member is fixedly coupled to the hub axle. The lock member includes a second attachment face that faces the first attachment face of the retaining member. The intermediate member is disposed between the first attachment face of the retaining member and the second attachment face of the lock member.

Abstract: A hub assembly for a bicycle includes a hub shell, a plurality of pawl units, and an annular ratchet member. The hub shell is rotatably mounted on a hub axle, and the annular ratchet member is disposed to rotate with the hub axle. Each pawl unit includes a pawl that is movable between driven and idle positions, an elongated mount that extends to bridge a gap formed in the pawl, and a biasing member that is mounted on the elongated mount to bias the pawl to move to the driven position so as to engage to the annular ratchet member.

Abstract: A bicycle hub driving system includes a hub with a socket unit connected thereto. An axle unit extends through the hub and the socket unit. A clutch driving device is located between the ratchet unit and the hub. The clutch driving device includes a clutch unit, a driving unit and a driving member located between the clutch unit and the driving unit. The clutch unit includes a first ratchet portion on the ratchet unit and a second ratchet portion on the driving member. The driving unit includes first driving teeth on the hub and second driving teeth on the driving member. By the linear movement of the riving member between the first driving teeth and the first ratchet portion, the first and second ratchet portions are engaged with each other or disengaged from each other to co-rotate the hub and the socket unit in one direction.

Abstract: An assembling structure for wheel and hub of an electric bicycle is disclosed, the structure capable of firmly assembling a hub and a wheel by separately manufacturing the hub embedded with a motor and a transmission gear box from the wheel, the structure including a hub accommodating a motor therein, a wheel coupled to one side of the wheel by way of a sliding fit, a groove unit circumferentially arranged at a periphery of the hub, and a lug unit formed at an area coupled to the hub of the wheel and meshed with the groove unit to allow the wheel to rotate with the hub, whereby coupling of the wheel and the hub is simplified to reinforce the coupling force therebetween.

Abstract: A sprocket support structure includes a main body, a plurality of projections and an abutment ring. The main body includes an outer surface with a plurality of parallel extending sprocket attachment splines defining a plurality of sprocket engaging grooves between the sprocket attachment splines. The projections extend radially outward farther than the sprocket attachment splines with respect to a rotation axis of the main body. Each of the projections includes a first surface facing in a first axial direction of the main body. The abutment ring is disposed on the main body as a separate member from the main body. The abutment ring includes a second surface facing in the first axial direction and axially spaced from the first surfaces of the projections with respect to the rotation axis. The second surface of the abutment ring is exposed between the projections as viewed along the sprocket engaging grooves.

Abstract: A wheel hub structure for a bicycle includes a wheel hub having a hub body, a first wheel plate defined at one end of the hub body, a second wheel plate defined at another end of the hub body, a first extruded ring outwardly extruded from the first wheel plate, a second extruded ring outwardly extruded from the second wheel plate, a plurality of sleeving rings respectively sleeving an outer periphery of the first extruded ring and an outer periphery of the second extruded ring. Therefore, each sleeving ring of the first extruded ring or the second extruded ring reinforces a center structure of the first wheel plate or the second wheel plate.

Abstract: A rear wheel hub assembly includes a sleeve and a first installation portion and a second installation portion are respectively located in the two open ends of the sleeve. A hub is mounted to one end of the sleeve and two bearings are located between the two open ends of the hub and the sleeve. A ratchet socket is mounted to an end of the sleeve and located away from the first positioning portion. Two end members are located on the two open ends of the sleeve and each end member has a body. The two respective bodies of the two end members are respectively engaged with the first and second installation portions. The two end members are replaceable when the axle of different sizes is replaced so as to be connected to the bicycle frame.

Abstract: A wheel hub with an axial-braking assembly for a wheel hub has an axle device and a braking device. The axle device has an axle, a hub, a wheel mount and a fixing mount. The hub is mounted around the axle. The wheel mount is securely mounted around the axle and has a threaded sleeve. The fixing mount is mounted around the axle. The braking device is connected to the axle device and has a pressing jacket, an engaging mount, a spring, two friction slices and a holding arm. The pressing jacket is mounted in the hub, is rotatably connected to the wheel mount and has an abutting inclined plane. The engaging mount is mounted in the hub and is connected to the fixing mount. The friction slices are mounted in the hub and are mounted around the pressing jacket at intervals. The holding arm is securely mounted around the fixing mount.

Abstract: A driving apparatus for a rear hub of a bicycle includes a hub shell, a single-directional driving component and a dual-directional driving component, wherein the single-directional driving component has a ratchet ring and a ratchet base, and a plurality of inclined helical surfaces are located around an inner perimeter of the ratchet ring, and a plurality of engaging ribs that engage with the wedging ribs of the fixed ring of the hub shell are located around an outer perimeter of the ratchet ring. A plurality of conjugating portions are located around an outer perimeter at one end of the ratchet base to form a resilient unit and a hook against the inclined helical surface. A plurality of conjugating ribs are located around one end of the dual-directional driving component, and the conjugating ribs are used to engage with the wedging ribs of the fixed ring of the hub shell.

Abstract: A wheel and rear hub gearbox assembly for single-sided mounting to a bicycle frame, with the gearbox mounted to the frame by a bearing situated intermediate the axial extent of the gearbox casing. The wheel is detachably mounted to the gearbox casing by cooperating mounting formations on the wheel and at one end of the casing. The wheel is positioned relative to the gearbox such that when the wheel is mounted to the gearbox casing, the bearing is central, in the axial direction, relative to the wheel.

Abstract: A hub assembly for a bicycle includes a shaft, a hub body rotatably mounted on the shaft, a drive seat rotatably mounted on the shaft and engaging the hub body, a first bearing located between the shaft and the hub body, a second bearing located between the shaft and the hub body, and a bushing unit located between the first bearing and the second bearing. The bushing unit includes a first adjusting sleeve and a second adjusting sleeve. The first adjusting sleeve has a first end provided with an outer threaded portion and a second end abutting the first bearing. The second adjusting sleeve has a first end provided with an inner threaded portion screwed onto the outer threaded portion of the first adjusting sleeve and a second end abutting the second bearing.

Abstract: A hub for two-wheeled vehicles with a hub body and method of manufacturing, wherein the hub body is rotatably supported on the axle via at least one bearing. The hub body includes a first forged component and a second forged component, wherein the first and second forged components are connected with one another through at least one sleeve and wherein both of the forged components have a plurality of fastening flanges protruding outwardly for fastening spoke units.

Abstract: A method of making a rear hub of a bicycle comprises: swaging a straight pipe into an hour-glass-shaped semi product, extruding the semi-product to form a hub flange, punching a plurality of holes in the hub flange of the semi-product, binding an edge of an end of the semi-product, necking down the edge-bound end of the semi-product, trimming the semi-product, and chamfering the holes of the semi-product to form a chamfer structure on an edge of the respective holes.

Abstract: Methods, apparatus, and kits for converting multiple speed bicycles to single speed are disclosed. The methods include removing a cassette of gears from the hub of a bicycle gear and installing a single gear between two clamps that are releasably secured to the hub. In some embodiments, the clamps may be split-ring clamps with ends that are connected by a fastener. Kits according to embodiments of the invention may include a gear and one or more clamps.

Abstract: Wheel hub arrangement with three drum units comprising a hollow drum (18), a winding of a flexible pulling element fixed on the drum, and a biasing spring (22) in the hollow inner space. Respective free-wheels (36) are provided at sides of the hub unit (4). The wheel hub unit comprises a pair of spaced driving sleeves (33) arranged in axial direction and the sides of the driving sleeves facing to a drum unit and being connected therewith to transmit of torque only. The driving sleeves are surrounded by intermediate sleeves (38) and a spacing is formed between them, wherein a ball bearing (35) and one of the freewheels are arranged so that they are connected both with the outer surface of the driving sleeve and the inner surface of the intermediate sleeve. The intermediate sleeves are connected rigidly together and they are also connected at least during the driving sessions to an outer sleeve (40) of the wheel hub unit.

Abstract: A torque coupling assembly including: a driving assembly with a driving axle and a rotatable driving shell; a driven assembly with a driven axle and a rotatable driven shell; and a frame element. The driving and driven shells each include an axial projection. In an assembled position, the driving and driven assemblies are both connected to the frame and their respective axial projections are aligned to transmit rotational torque between the driving shell and the driven shell. In a removed position, one of the driving assembly and the driven assembly may be removed in a generally radial direction relative to the frame and the other of the driving assembly and the driven assembly. The driving and/or driven assembly may include ramped lead-in geometry. The driving and/or driven assembly may include shielding geometry to axially overlap at least a portion of the axial projection.

Abstract: A rear hub assembly for bicycle includes a ratchet wheel and a hub body assembled with the ratchet wheel. The hub body has a first hub plate disposed on one end thereof. The first hub plate has a plurality of protrusions formed on an outer lateral surface thereof. A dodging portion is formed between every two adjacent protrusions. A plurality of recesses are defined in an inner lateral surface of the first hub plate. A plane portion is formed between every two adjacent recesses. The first hub plate has a plurality of bores defined therein and located on each protrusion and dodging portion. A first and a second stepped level difference are respectively defined between every recess and plane portion; and between every protrusion and dodging portion. A plurality of spokes engaged with the bores respectively and buckled the first hub plate.

Abstract: A bicycle hub assembly includes a hub having a driving tube connected one end thereof and the driving tube includes a ratchet portion and a sprocket portion respectively defined in an outer periphery thereof. A first recess and a second recess are defined in an inner periphery of the driving tube, wherein the first recess is located corresponding to the ratchet portion and the second recess is located corresponding to the sprocket portion. A ratchet unit is mounted to the ratchet portion and a sprocket unit is mounted to the sprocket portion. A first rotary member and a second rotary member are engaged with the first recess and the second recess respectively.

Abstract: A bicycle wheel hub assembly having a number of light emitting diodes (LED's) that are powered by rotation of the wheel during use of the bicycle. The hub assembly includes a magnet and a coil that are both internal to the hub. The light emitting diodes are powered by current induced in the coil and controlled so as to preferably prevent illumination of discrete LED's when the respective LED's are directed toward a user during rotation of the hub. The LED's are supported by the hub and rotate with the hub during rotation of the wheel. In some embodiments, the LED's are attached to the hub at locations that are both laterally inboard and laterally outboard relative to a spoke flange of the hub assembly.

Abstract: A method and assembly for mounting an auto rim and either motorcycle or auto tire as a motorcycle rear wheel. The assembly allows tires of different widths and diameters to be used on the rear of motorcycles that have single side swing arms and standard swing arms. The method and assembly allows a left side or right side drive which can be a belt or chain. A hub with bearings and spacers are mounted with a brake rotor disk and a drive pulley in tandem to produce a hub assembly.

Abstract: Bicycle component and method for assembling a bicycle component comprising several units of which one unit is configured as a fixed unit and at least one unit, as a rotary unit. A fixed unit forms the hub axle and a rotary unit is configured as a hub body. The hub body is provided with a spoke socket for fastening spokes and is rotatably supported relative to the hub axle by means of at least one bearing. At least one separate sealing cap fastened at one of the several units is provided at which a sealed through opening for a unit is provided which unit is rotatable relative to the hub body.

Abstract: A protection unit for a driving socket of a hub includes a hub with a driving socket connected to an end thereof and the driving socket has multiple ribs extending axially on the outer surface thereof. At least one protection unit is located between two ribs and has an engaging portion. A cover includes a cover face and two sidewalls so as to form an engaging groove. The engaging portion is engaged with the engaging groove. The three sides of the engaging portion are protected by the cover. The cover can be easily mounted to the ribs by the engagement of the engaging portion and the engaging groove so that the cover does not slip away from the ribs in radial direction.

Abstract: A bicycle rear hub includes a hub spindle, a drive part, a hub shell and a driving force measuring part. The drive part is rotatably supported on the hub spindle, and configured to receive a driving-force-input member. The hub shell is rotatably supported on the hub spindle and operatively coupled to the drive part for rotation by the drive part on the hub spindle. The driving force measuring part includes a first signal generating mechanism and a second signal generating mechanism. The first signal generating mechanism has a first magnet and a first coil. The second signal generating mechanism has a second magnet and a second coil. The second signal generating mechanism is axially aligned with the first signal generating mechanism in an axial direction of the hub spindle.

Abstract: A bicycle rear hub includes a hub spindle, a drive part, a hub shell and a driving force measuring part. The drive part is rotatably supported on the hub spindle, and configured to receive a driving-force-input member. The hub shell is rotatably supported on the hub spindle and operatively coupled to the drive part for rotation by the drive part on the hub spindle. The driving force measuring part includes a magnetostrictive element disposed in a driving force transmission path between the drive part and the hub shell, and a detection coil disposed in opposition to the magnetostrictive element.

Abstract: A hub for a bicycle, including a hub body, and a torque tube disposed in the hub body. A first mating element is disposed at a first end of the torque tube and a second mating element is disposed at a second end thereof. Each of the first mating element and the second mating element includes an anti-rotation hub feature, and the torque tube transfers torque between the first mating element and the second mating element.

Abstract: A bicycle rear hub includes a hub spindle, a drive part, a hub shell and a driving force measuring part. The drive part is rotatably supported on the hub spindle, and configured to receive a driving-force-input member. The drive part includes a coupling part having a liquid storage area filled with a liquid. The hub shell is rotatably supported on the hub spindle and operatively coupled to the coupling part of the drive part for rotation by the drive part on the hub spindle. The driving force measuring part includes a liquid pressure sensor that detects pressure of the liquid in the liquid storage area of the coupling part of the drive part.

Abstract: A bicycle rear hub includes a hub spindle, a drive part, a hub shell, at least one first opposed part, at least one second opposed part and a driving force measuring part. The drive part is rotatably supported on the hub spindle, and configured to receive a driving-force-input member. The hub shell is rotatably supported on the hub spindle and operatively coupled to the drive part for rotation by the drive part on the hub spindle. The at least one first opposed part is coupled to the drive part. The at least one second opposed part is coupled to the hub shell and being disposed oppose to the first opposed part with a gap therebetween. The driving force measuring part includes at least one sensor arranged to measure at least one of the gap between the first and second opposed parts and a displacement of the gap.

Abstract: A bicycle rear hub includes a hub spindle, a drive part, a hub shell, at least one first opposed part, at least one second opposed part and a driving force measuring part. The drive part is rotatably supported on the hub spindle, and configured to receive a driving-force-input member. The hub shell is rotatably supported on the hub spindle and operatively coupled to the drive part for rotation by the drive part on the hub spindle. The at least one first opposed part is coupled to the drive part. The at least one second opposed part is coupled to the hub shell and is disposed oppose to the first opposed part. The driving force measuring part includes a pressure sensor provided for contacting the first and second opposed parts.

Abstract: A hub shell of a hub assembly is rotatable about a fixed hub shaft. A power transmitting member is disposed within the hub shell. A pawl supporting member has at least one pawl member movable between an active position where the pawl member allows transmission of rotary power from the hub shell to the power transmitting member and an inactive position decoupling the pawl from one of the power transmitting member and the hub shell. A one way roller clutch assembly is coupled between the power transmitting member and the hub shell and is movable between an active position where the roller clutch assembly couples the power transmitting member to the hub shell to transmit rotary power from the power transmitting member to the hub shell and an inactive position decoupling the power transmitting member from the hub shell.

Abstract: A splined drive body for supporting a plurality of sprockets is disclosed. The drive body is provided with at least one composite drive body spline which consists of a first portion made up of the drive body material and a second portion made up of a different, harder material. The second portion of the composite drive body spline is an insert which includes a force receiving surface and a force transmitting surface and is operable to transmit force transmitted to it into the drive body through a force receiving surface provided on the first portion of the composite drive body spline.

Abstract: A hub assembly includes a shaft, a hub mounted on the shaft and having a plurality of locking grooves, a driven ring mounted in the hub and having a plurality of oneway ratchet teeth, a drive seat rotatably mounted on the shaft, a drive ring mounted on the drive seat and received in the driven ring, a plurality of pawl members mounted on the drive ring and meshing with the oneway ratchet teeth, a sprocket secured on the drive seat, and a control ring slidably mounted on the drive seat and having a plurality of locking blocks releasably locked in the locking grooves. Thus, a user only needs to move the control ring to switch the operation modes of the bicycle between a normal riding and an acrobatic performance so that the user can change the two operation modes easily and quickly.

Abstract: A bicycle hub is made of shaped sheet metal. The bicycle hub comprises two rims (6, 7) which are located at end sections (3, 4) of the hub. The rims (6, 7) comprise holes (11) for accommodating spokes, and are bent radially outwards and held at a distance from one another by a sleeve (5). The end sections (3, 4) further comprise internal ball tracks (8). The end sections (3, 4) are designed such that each of the end sections (3, 4) is formed as a double wall comprising an inner wall and a closely fitting and abutting outer wall at least in the ball track area (8), whereby the rim (6, 7) is attached to the outer wall.

Abstract: A skewer assembly for a rack mount having a cam disposed against a cam follower actuable from an open configuration to a closed configuration, the skewer assembly further having a lock assembly integrated with the cam follower and a locking member located within a radial contact surface perimeter of the cam. The skewer further having a tightening assembly with a ratcheting nut which is incapable of being loosened when the skewer is placed in tension. Moreover, the skewer assembly covers the access holes to the internal hardware of the rack mount when inserted therein.

Abstract: A hub for a bicycle includes a shaft (12), a hub body (40), a ratchet wheel (43), a drive seat (10), a support ring (15), a rotation ring (21), a plurality of pawl members (22), a stop bushing (121), a limit ring (30) and a damper (33). Thus, when the drive seat is rotated backward by the pedal, each of the pawl members is retracted into the respective receiving slot (212) of the rotation ring to disengage the oneway ratchet teeth (42) of the ratchet wheel, so that each of the pawl members is spaced from and will not touch the ratchet wheel when the pedal is driven backward to prevent from producing a noise when the pedal is driven backward.

Abstract: A bicycle hub of the present invention comprises two discs, an axial portion, and a connecting portion. The discs are formed with a through hole individually. The axial portion comprises a first end, a second end, and a middle section. The first and the second end of the axial portion penetrate the through hole of one of the discs individually. The connecting portion connects between two discs. The connecting portion defines at least an open portion so that at least a part of the middle section of the axial portion is not enclosed and can be seen. As such, the connecting portion of the present invention defines the open portion so that the connecting portion incompletely encloses the middle section of the axial portion. Whereby the connecting portion not only saves material, but reduces the weight of the bicycle hub.

Abstract: A hub assembly includes a hub and an axle extending through the hub. A ratchet ring is located in the hub and has multiple ratchet teeth in an inside thereof. A transmission unit has a ratchet part located in the ratchet ring and the ratchet part has at least one transmission recess and at least one positioning recess defined in an outside thereof. The at least one transmission recess and the at least one positioning recess respectively have a transmission piece and a positioning pieces rotatably received therein. The transmission piece has a driving end engaged with one of the ratchet teeth. A resilient ring restricts the transmission piece and the positioning piece on the ratchet part. By the switch the transmission piece and the positioning piece, the transmission direction can be changed.

Abstract: A quick release mechanism including a shaft having a first end cap and a second end cap is provided. The second end cap is attached to, or associated with, a lever designed and configured for actuating the quick release mechanism between closed and open positions and for use as a bicycle repair tool.

Abstract: Device including an inner shaft and an outer body rotatably mounted about an axis with respect to the shaft via at least one rolling bearing, the rolling bearing including an inner ring mounted on the inner shaft and an outer ring mounted in a housing of the outer body, the device including an automatic backlash elimination mechanism. The automatic backlash elimination mechanism includes a first washer having a tapered surface, and an elastic element in contact with the tapered surface of the first washer, the elastic element structured and arranged to generate a radial return force that is converted, by means of the tapered surface, into an axial force in order to eliminate the backlash related to the mounting of the rolling bearing. The first washer can be mounted on the shaft, in which case the elastic element generates a centripetal return force, or it can be mounted in the bore of the outer body, in which case the elastic element generates a centrifugal return force.

Abstract: In one example, a structure for attaching a wheel to one of a frame of a motorcycle or a bicycle may include an axle having first and second opposing end portions and supporting a wheel, a left axle support collar structure configured to support the first opposing end portion of the axle, and a right axle support collar structure configured to support the second opposing end portion of the axle. A first bearing is positioned in the left axle support collar structure, and a second bearing is positioned in the left axle support collar structure. The axle rotates relative to the frame.

Abstract: A bicycle hub assembly comprises a shaft, a first load bearing adjacent said shaft, a hub main body surrounding said shaft, and a cogset. The cogset can define an inner surface, and the inner surface can define a seat configured to receive the first load bearing. Further, the inner surface can define an opening of variable size. The cogset can also define an inner end and an outer end, and the opening can generally increase in size from the outer end to the inner end.

Abstract: A hub assembly for a bicycle includes a hub, a drive seat arranged on the hub, a protective bushing mounted on the drive seat, and a freewheel unit mounted on the protective bushing. The drive seat has an outer periphery provided with a plurality of positioning ribs. The protective bushing has an inner periphery provided with a plurality of positioning grooves forcibly fitted onto the positioning ribs and has an outer periphery provided with a plurality of reinforcing ribs each surrounding the respective positioning groove. Thus, the positioning ribs of the drive seat are reinforced by the reinforcing ribs of the protective bushing so that when the drive seat is subjected to a torque which is applied by the rotating freewheel unit, the positioning ribs can withstand the torque without producing distortion or wear.

Abstract: A bicycle hub assembly includes a hub and a tubular portion extends from one end of the hub. A sprocket is connected to the tubular portion. A ratchet unit is located between the hub and the transmission unit so that the hub and the transmission unit are operatively connected to each other indirectly and in one way by the ratchet unit. A control unit has first positioning portions on the hub and second positioning portions integrally formed with the tubular portion. The first positioning portions and the second positioning portions are connected to each other by bolts, and the first positioning portions and the second positioning portions are separated from each other when the bolts are removed. The hub assembly can be switched between direct and two-way transmission into indirect and one-way transmission by arrangement of the bolts.

Abstract: A quick release for bicycles comprising a pull rod extending in the axial direction, an end element at a first end of the pull rod, a clamping element at the second end of the pull rod, and a tensioning device for tensioning the clamping element. The tensioning device comprises a lever for applying the clamping force and a tensioning sleeve with a transmitter portion for transmitting the clamping force to an engaging portion of the clamping element. The lever is positioned to be movable relative to the clamping element in the axial direction of the pull rod and against the biasing force of a biasing spring is movable outwardly in the axial direction of the pull rod from an engaged position to a turn position. In the turn position an angular position of the lever can be set independently of the state of tensioning.