Abstract: A bicycle crank assembly is provided with a crank arm including a front side surface and a back side surface. The crank arm has a crank axle mounting portion with a crank axle receiving opening defined by an axle coupling structure. The axle coupling structure at least includes a plurality of full length splines and at least one short spline. The full length splines extends completely in an axial direction of the crank axle receiving opening from a first axial end edge to a second axial end edge. The short spline extends in the axial direction with a truncated end positioned adjacent one of the first and second axial end edges such that the at least one short spline does not extend completely from the other of the first and second axial end edges to the one of the first and second axial end edges.

Abstract: A bicycle crank assembly is provided that basically provided with a crank arm that includes a first outer shell, a second outer shell, a first axle supporting member and a second axle supporting member. The first outer shell has a first elongated portion with a first axle attachment end. The second outer shell has a second elongated portion with a second axle attachment end. The first and second outer shells are adhesively attached together to form an interior cavity therebetween. The first axle supporting member is disposed at the first axle attachment end of the first outer shell. The first axle supporting member has a first bore with a first splined inner surface that is at least partially disposed in the interior cavity between the first and second outer shells. The second axle supporting member is disposed at the second axle attachment end of the second outer shell.

Abstract: A shock absorption system for a bicycle that is simple, flexible and compatible with the many sections of a bicycle where adequate shock absorption is sought. The shock absorption properties are provided through a C-shaped compliant structure. C-shaped compliant structure may be removable such that it may be installed and removed as per the desire of the end user of the bicycle for post market modification and personalisation purposes.

Abstract: A drive device for a machine, which has a drive shaft that can be rotated about an axis, and two driving cranks which are connected to the shaft in an angularly rigid manner in relation to the axis thereof. In order to determine the torque applied to the drive shaft in a simple and economical manner, the drive device has at least one magnetostrictive body connected to the driving cranks in a fixed manner, and a magnetic field sensor for measuring the magnetic stray field of the magnetostrictive body.

Abstract: An improved power transfer mechanism for use on a human-powered machine, adapted to be drivingly connected to a power take-off device of said machines, includes: a housing adapted in use, to be disposed within a frame of said human-powered machine; at least one crankshaft adapted to be disposed within said housing; respective left-side and right-side crank arms each adapted to be drivingly associated with an end of said at least one crankshaft; and drive transfer means adapted to co-operate with said at least one crankshaft and each associated crank arm, the arrangement being such that a first member of the group comprising and left-side and right-side crank arms and said power take-off device is adapted to be attached to said at least one crankshaft, such that each of the second and third of said members is adapted to be rotatable relative to said first of said members, and each other, only to a limited and controlled degree, whilst not be movable axially or in a longitudinal direction relative to said at le

Abstract: A bicycle component is provided comprising an elongated body consisting of structural fibers incorporated in a matrix of polymeric material and having, in an end part thereof, a seat for the mechanical coupling of the component with an element of the bicycle. Also provided in the zone between the seat and the end of the body is a continuous layer of structural fibers which surround the seat and which ensure mechanical continuity in the aforementioned zone. The central part of the component comprises at least one first layer formed of continuous structural fibers incorporated in a matrix of polymeric material and at least one second layer formed of small pieces of structural fibers incorporated in a matrix of polymeric material and arranged randomly inside the layer, such layers overlapping each other.

Abstract: A crankset comprises an axle assembly, a removably attached crankarm, and a non-removably attached crankarm. The removably attached crankarm is attached at a first end portion thereof to a first end portion of the axle assembly. The non-removably attached crankarm is attached at a first end portion thereof to a second end portion of the axle assembly. Each one of the crankarms has a plurality of longitudinal holes therein extending between the first and second end portions thereof. The longitudinal holes each extend through an end face of a respective one of the crankarms at the first end portion thereof. The removably attached crankarm is bent inwardly toward the second end portion of the axle assembly after the longitudinal holes are formed therein. Only one of the longitudinal holes of the removably attached crankarm intersects an axle fastener engagement hole that extends through the first end portion of the removably attached crankarm.

Abstract: A human powered transmission for self propelled vehicles having oscillating power input levers displacing a pivoted power input member. The power input member pivotally journaled to a power output lever, the power output lever bearing on a fulcrum roller. The fulcrum rollers having a mechanism for adjusting the fulcrum roller along a predetermined length of the power output lever. Power output lever having a power output pivot, the power output pivot is connected to a flexible member for transferring tensile force to a unidirectional torque converter.

Abstract: A scooter having a rockable platform upon which the rider stands with both feet. The platform is attached by a chain to one-way sprocket wheels mounted to the scooter rear wheel rotating the rear wheel to propel the scooter in a forward direction as the front end of the platform moves and as the rear end portion of the platform moves down. The scooter has a position to allow the user to place one foot on the ground and one foot on the platform to propel the same.

Abstract: A pedal shaft for bicycles with elbow-shaped cams allows the dead centre of the pedaling motion to be cancelled out, thus resulting in more power with less exertion.

Abstract: A bicycle crank comprises an L-type left crank and an L-type right crank. The L-type left/right cranks are respectively and integrally composed of a crank and a connection head, and includes a through hole passing through the crank and the connection head, a left compression shaft and a right compression shaft respectively disposed to terminals of the through holes of the L-type left/right cranks, a cone shaped member in which two ends are respectively disposed in the left and right compression shafts and the inner surface has screw threads, a rotary sleeve that is a hollow and integrally formed, and two locking members in which a terminal has screw threads corresponding to the cone shaped member and for respectively passing through the through holes and locked to two ends of the cone shaped member to connect the L-type left crank and the L-type right crank.

Abstract: A bottom bracket assembly for a bicycle includes a bottom bracket, two axles mounted on the bottom bracket and two cranks each having a mounting tube mounted on the respective axle. Each of the axles has a first engaging face, and the mounting tube of each of the cranks has a second engaging face engaging the first engaging face of the respective axle. Thus, the first engaging face extends through a partial portion of the circumference of each of the axles, and the second engaging face extends through a partial portion of the circumference of the mounting tube of each of the cranks to reduce the clearance between the mounting tube and the respective axle, so that the mounting tube of each of the cranks and the respective axle are combined together closely and tightly.

Abstract: A device for disassembling and assembling bicycle pedals comprises a bicycle crank (1), detachable pedals (17) connected with the crank (1), a fixing seat (11) arranged at an end of the crank (1), a control device arranged at the fixing seat (11) and a connection assembly between a pedal (17) and the control device. The control device also comprises an unlocking mechanism, a pushing mechanism and a rotating mechanism, wherein the pushing mechanism and the rotating mechanism are controlled by a gear mechanism. The device can conveniently and quickly disassembling and assembling bicycle pedals by one step without touching the pedals with hands.

Abstract: An improved bicycle crankshaft assembly, including a crank axle with an axial axial axis, a first axle end, and a second axle end axially opposed to the first axle end; a first crank arm connected to the crank axle at a first crank arm interface adjacent the first axle end; a second crank arm connected to the crank axle at a second crank arm interface axially spaced from the first crank arm interface; a first bearing surrounding said crank axle adjacent said first axle end for rotation of said crank axle about said axial axis; a second bearing surrounding the crank axle and axially spaced from the first bearing. The crank axle includes reinforcement fibers for structural reinforcement of the crank axle and the crank axle is an integral crank axle that extends through the first bearing and the second bearing.

Abstract: A bicycle crank axle comprises an axle body having first and second end portions, a plurality of first splines disposed at the first end portion of the axle body, a plurality of second splines disposed at the second end portion of the axle body, and a projection extending radially outwardly from the first end portion of the axle body, wherein the projection is structured to abut against a lateral outer surface of a bicycle crank arm to prevent the bicycle crank arm from moving axially outward. A separate projecting member is mounted to the first end of the axle body to form the projection. The plurality of first splines extend radially outwardly from an outer peripheral surface of the axle body for engaging a splined surface of the bicycle crank arm, but the plurality of second splines do not extend radially outwardly relative to the outer peripheral surface of the axle body.

Abstract: A chain guide mount is adapted to be attached on a bicycle having a frame including a bottom bracket shell. A bottom bracket sleeve is position in the shell, and the sleeve includes a first anti-rotation feature. The chain guide mount has mounting locations for attachment of a chain guide, and further has a second anti-rotation feature engaging the first anti-rotation feature to thereby inhibit rotation of the chain guide mount relative to the sleeve. In one embodiment, the sleeve includes a cylindrical part position in the shell and a flange positioned outside the shell. In order to insure proper rotational orientation of the chain guide mount, the first and second anti-rotation features are preferably asymmetrically positioned around a bottom bracket axis defined by the bearing. In addition, a first alignment feature is provided on the frame, and the sleeve includes a second alignment feature engaging the first alignment feature.

Abstract: A crank arm is provided, having a body made of a composite material, the body defining two apertures, each aperture defining a plurality of recesses. Each of the recesses extends outwardly a distance from a center of the corresponding aperture and widens as the distance increases. Inserts made of a material surrounding the inside edge of each aperture, and each insert has extensions fitting within a corresponding recess. When the crank arm is cooled, the material shrinks relative to the body, and the recesses maintain the insert in position during the cooling process.

Abstract: A crank arm (200) includes a mechanical ring amplifier (232), having a cavity and a connecting bridge (140), to amplify the radial strain exerted on the crank arm by a rider. Strain sensors (234, 235) are positioned to detect the amplified radial strain. The crank arm (200) may include further strain sensors (228, 229) adapted to detect tangential strain on the crank arm, allowing both the tangential and radial forces exerted by a bicycle rider to be measured. The crank arm (200) may also comprise means for adjusting the position of a pedal axle relative to the crank arm, via the loosening, rotation and retightening of a carrier disc held by the crank arm, where the carrier disc has an eccentrically mounted aperture for holding the pedal axle.

Abstract: A crank assembly for fitness equipment includes a ductile spacer engaged between a crankshaft mounting surface and a crank arm mounting surface at the interface thereof and conforming respectively to each to maximize surface contact area to distribute loads across a larger area.

Abstract: A bicycle (1) with a bearing (126) including at least one plain bearing bush (126a). The at least one plain bearing bush (126a,) is provided to absorb the radially acting forces. At least one rolling element bearing is provided to absorb the axially acting forces.

Abstract: The wobble bearing axle assembly is used for engaging the upper body of a person for use in human powered vehicles and exercise equipment. The wobble bearing assembly converts linear input force derived by the operator into rotational force, which is directed toward the forward propulsion of a wheel. The wobble bearing axle assembly comprises a wobble bearing, a wobble axle, at least two engagement members a first arm and a second arm. The wobble bearing is disposed upon the oblique retainer of the wobble axle. The oblique retainer of the wobble axle is angled offset from the axis of the wobble axle Y. The engaging members are rotatably affixed with the first and second arms through pins which is longitudinally disposed through complementary orifices through the first and second arms and the engaging members respectively. In some preferred embodiments additional bearings are engaged with the pedals powered by the legs of the operator.

Abstract: A bicycle crank shaft assembly includes first, second and third members. The first member defines first (crank axle), second (first segment of first crank arm) and third (first segment of second crank arm) portions, the first, second and third portions of the first member being integral and continuous with each other and having a generally s-shaped configuration. The second member defines a second segment of the first crank arm, and the third member defines a second segment of the second crank arm. The first and second segments of the first crank arm are bonded to each other with a bond seam therebetween to define the first crank arm, and the first and second segments of the second crank arm are bonded to each other with a bond seam therebetween to define the second crank arm. At least one of the crank axle, the first crank arm and the second crank arm is hollow.

Abstract: A bicycle is provided having a unitary steering tube-crown member and a unitary crank arm-spindle member. A multistage aluminum 3D forging process is used to form the unitary members. This may allow the fabrication of components with substantially hollow interior areas to reduce weight, reduce part count while maintaining high strength and ductility. The multistage 3D forging process provided also allows the combination of multiple components into a single unitary part.

Abstract: An improved bicycle crankshaft assembly, including a crank axle with an axial axle axis, a first axle end, and a second axle end axially opposed to the first axle end; a first crank arm connected to the crank axle at a first crank arm interface adjacent the first axle end; a second crank arm connected to the crank axle at a second crank arm interface axially spaced from the first crank arm interface; a first bearing surrounding said crank axle adjacent said first axle end for rotation of said crank axle about said axial axis; a second bearing surrounding the crank axle and axially spaced from the first bearing. The crank axle includes reinforcement fibers for structural reinforcement of the crank axle and the crank axle is an integral crank axle that simultaneously contacts both the first bearing and the second bearing.

Abstract: A bicycle sprocket crank assembly is comprised of first and second crank arms joined to a spindle. One of the crank arms and the spindle may be fabricated as a unitary structure, or both cranks arms may be formed as separate structures and joined together. In either case the spindle has at least a first coupling end with an internally tapped axial bore defined therein and the second crank arm forms at least a first socket at its axle end. At least a first wedging sleeve is provided and is disposed about the first coupling end of the spindle. The first wedging sleeve conforms to the shapes of both the first coupling end of the spindle and the hollow cavity in the first socket. Either the coupling end of the spindle or the hollow cavity is axially tapered, and the wedging sleeve is tapered to match.

Abstract: A bottom bracket assembly for use on a bicycle, the assembly provided as a split bracket assembly with an upper portion formed integrally with the bicycle frame and a lower portion detachably connectable to the upper portion, the lower portion completely removable from the upper portion. The bottom bracket assembly provided to capture a crank shaft therein with associated bearings to facilitate the rotation of the crank shaft assembly.

Abstract: A crank mechanism useful on a bicycle or an exercise machine utilizing a pair of crank arms. A crank arm is attached to a crankshaft so that it can turn the crankshaft in either direction but is free to move through a defined angle about the crankshaft between positions of oppositely driving engagement with the crankshaft. The mechanism can be used in training athletes. In one embodiment the mechanism can be used to aid a bicyclist in maintaining an aerodynamic posture.

Abstract: A bottom bracket assembly for supporting the crank axle of a bicycle includes a bottom bracket and two bases are securely connected to two open ends of the bottom bracket. Each base has a bearing received in a recess defined in an end thereof. Two collars each have a neck which is inserted and engaged with a central hole of the bearing corresponding thereto and each neck has a tapered inner periphery. An axle extends through the two bearings and the two collars. Two positioning rings are positioned between the axle and the tapered inner periphery of the collar. Each positioning ring has a tapered outer periphery which is matched with the tapered inner periphery of the collar corresponding thereto.

Abstract: The present invention relates to a propulsion mechanism provided with two independent actuators, the first actuator being connected via a first connection member CD to a first converter ED, RLD mounted on a transmission shaft AT. Further, the second actuator is connected via a second connection member CG to a second converter EG, RLG mounted on the same transmission shaft AT.

Abstract: A pedal crank for a bicycle comprising structural fibers incorporated in a matrix of polymeric material which has two seats in which two metal inserts are received. The seats have a mouth which opens onto the outer surface of the pedal crank and have a geometry such as to allow the insertion of the inserts from outside of the pedal crank.

Abstract: According to some embodiments, a sensor device for determining forces exerted by a cyclist on a pedal of a bicycle is provided. The sensor device includes a plurality of sensors coupled to a substrate, and wiring coupled to the sensors and the substrate, wherein the sensors, the substrate, and the wiring are housed inside a pedal spindle coupled to the pedal. The sensor device may also be used in a system for improving a pedaling technique of a cyclist.

Abstract: The chain transmission includes a crank connected to a second crank by an axle of the chain transmission while forming one piece of a single support. The chain transmission axle is housed in a chain transmission tube with the interposition of two bearings arranged around the axle of the chain transmission near the ends of the latter in order to allow rotation of the chain transmission axle in the chain transmission tube. A large chain drive sprocket wheel is located near one of the ends of the chain transmission axle and rotates concomitantly with the latter. The cranks and the chain transmission axle are made of a composite material or a hollow lightweight alloy. A first and second intermediate bushing made of an abrasion-resistant material are attached to the chain transmission axle near one respective end of the latter to receive a respective bearing.

Abstract: A bicycle shaft component includes an outer tubular member and an inner member non-movably attached to the outer member. The outer tubular member includes a first end portion and a second end portion with an interior longitudinal passageway extending between the first and second end portions. The interior longitudinal passageway has a longitudinal center axis extending through it. The inner member is non-movably attached to the outer tubular member within the interior longitudinal passageway. The outer tubular member is constructed of a first material having a first specific gravity and the inner member is constructed of a second material having a second specific gravity that is lower than the first specific gravity of the first material.

Abstract: A bicycle crank assembly is configured to simplify the work required to adjust the bearing play by the crank assembly when the crank assembly is mounted. The bicycle crank assembly has a left crank that is mounted on a crank axle of the bicycle, and is provided with a crank body and an adjustment member. The crank body includes a crank axle mounting part non-rotatably mounting to one end of the crank axle, an arm part extending from the crank axle mounting part, a pedal mounting part for mounting the pedal and provided at the tip of the arm part, and a male screw part formed on the crank axle mounting part. The adjustment member includes a tubular part having a female screw part into which the male screw part is screwed, and a contact part formed at one end of the tubular part and capable of contacting the bearing supporting the crank axle.

Abstract: A pedal crank for a bicycle comprising structural fibers incorporated in a matrix of polymeric material which has two seats in which two metal inserts are received. The seats have a mouth which opens onto the outer surface of the pedal crank and have a geometry such as to allow the insertion of the inserts from outside of the pedal crank.

Abstract: A crank including a mechanism capable of connecting the crank arm to a shaft to drive the shaft in rotation in either a unidirectional drive mode or a bidirectionally driving mode, the mechanism being quickly adjustable between modes. A coupler in the mechanism may be slidable between a first position engaging the crank arm with a hub portion fixedly mounted on the shaft and a second position in which a unidirectional clutch can operate to allow rotation of the crank arm freely about the shaft in one direction but cause rotation of the shaft in the opposition direction. The coupler may be arranged to be coupled only when the shaft is in a selected angular position.

Abstract: The invention relates to an assembly (1) of bicycle components in mutual rotation, like for example a bottom bracket assembly. The assembly of the present invention comprises a support element (15), a rotary element (5) rotatably coupled with the support element (15) and at least one bearing (20) arranged between the support element (15) and the rotary element (5). The bearing (20) comprises at least one bearing element (30, 40) firmly coupled with one from the support element (15) and the rotary element (5). The bearing element (30, 40) and the element (5, 15) with which it is firmly associated have, at respective mutually coupled interface surfaces (36, 38, 42, 44),a standard reduction potential difference lower than or equal to 0.3 V, in absolute value.

Abstract: A pedal connection arrangement includes a pedal having a spherical portion with an outer spherical surface. The pedal connection arrangement also includes a bicycle shoe that has a pedal gripping cavity that directly engages at least portions of the outer spherical surface of the pedal when the shoe is engaged with the pedal. The shoe is configured so that the pedal gripping cavity securely grips outer spherical surface of the pedal, yet remains free to swivel in various directions about the spherical portion of the pedal when the shoe is engaged with the pedal. The various directions include directions other than about the pedal longitudinal axis, thereby giving more flexibility for movement of the rider's foot while maintaining positive contact between the shoe and the pedal.

Abstract: A bicycle chain wheel structure is configured with a right crank arm portion and an axle portion that are integrally formed together as a one-piece, unitary member. The right crank arm portion has an inner end integrally formed with the axle portion. The right crank arm portion has an outer end with a pedal mounting arrangement. The axle portion has a first end that is integrally formed with the right crank arm portion and a second end with a crank arm mounting arrangement. The axle portion has external threads disposed between the first and second ends of the axle portion. Thus, a portion of a bottom bracket is partially integrated into the bicycle chain wheel structure. Preferably, the chain guard is integrated into the right crank arm as a one-piece, unitary member. This arrangement reduces parts and manufacturing costs of the bicycle chain wheel structure.

Abstract: A bicycle sprocket crank assembly is comprised of first and second crank arms joined to a spindle. One of the crank arms and the spindle may be fabricated as a unitary structure, or both cranks arms may be formed as separate structures and joined together. In either case the spindle has at least a first coupling end with an internally tapped axial bore defined therein and the second crank arm forms at least a first socket at its axle end. At least a first wedging sleeve is provided and is disposed about the first coupling end of the spindle. The first wedging sleeve conforms to the shapes of both the first coupling end of the spindle and the hollow cavity in the first socket. Either the coupling end of the spindle or the hollow cavity is axially tapered, and the wedging sleeve is tapered to match.

Abstract: A bottom bracket assembly (1) of a bicycle is disclosed. The bottom bracket assembly includes a shaft (2) extending along a predetermined longitudinal direction and a pair of bearings (31, 41) adapted to rotatably support the shaft (2) with respect to a housing box (10) provided in a bicycle frame, the bearings (31, 41) being mounted on the shaft (2) at opposite end portions (3, 4) of the shaft (2). The opposite end portions (3, 4) of the shaft (2) have an outer diameter (D2) between 28 mm and 37 mm, bounds being included, and the distance (D1) between the median planes (Y1, Y2) of the bearings (31, 41) along the longitudinal direction is between 80 mm and 100 mm, bounds being included.

Abstract: An improved multifunctional pedaling motion bicycle, particularly to a transmission mechanism of bicycle includes a clutch member that is manually controlled to move between and selectively engage primary and secondary control blocks to perform different modes of operation of the bicycle, including regular pedaling, independent pedaling of cranks, same-direction upward/downward movements of the cranks. The transmission mechanism has a simple and light-weighted structure and thus low cost and low failure risk with extended service life. Further, a variety of different operation modes can be performed without dedicated rear hub.

Abstract: A crank for bicycles or other cycling facilities includes an elongate shank having an orifice formed in one end, and a chamber formed by an upper wall and a lower wall, a gasket is engaged into the chamber via the orifice of the shank. The gasket is engaged between the walls of the shank, and a fastener may be engaged through the orifice of the shank and may be engaged through a bore of the gasket. The shank includes an aperture having an inner diameter smaller than that of the orifice, a second gasket may be engaged into the chamber via the orifice of the shank and includes a bore aligned with the aperture of the shank.

Abstract: A crank device includes a crank arm having an opening formed in one end and defined by an outer peripheral fence for attaching to a crank shaft, and an orifice formed in another end and defined by an outer peripheral wall for coupling to a foot pedal, and the crank arm includes one or more apertures formed in the other end and formed in the outer peripheral wall for weight reducing purposes. The aperture may be laterally formed in the other end of the crank arm, or formed through the outer peripheral wall of the crank arm and communicating with the orifice of the crank arm. The crank arm may further include one or more depressions for further weight reducing purposes.

Abstract: A crank is provided with a crank axle connecting portion for connecting a crank axle thereto, a pedal connecting portion for connecting a pedal thereto, and a main crank portion positioned between the crank axle connecting portion and the pedal connecting portion. A first insert member is arranged in the crank axle connecting portion, and has an axle attaching part having a crank axle connecting hole and an extended part extending from the axle attaching part toward the pedal connecting portion so as to following along the main crank portion. The crank axle further includes a shell member made of a fiber-reinforced resin that at least partially covers an outside facing surface of the first insert member.

Abstract: A bicycle sprocket crank assembly is comprised of first and second crank arms joined to a spindle. One of the crank arms and the spindle may be fabricated as a unitary structure, or both cranks arms may be formed as separate structures and joined together. In either case the spindle has at least a first coupling end with an internally tapped axial bore defined therein and the second crank arm forms at least a first socket at its axle end. At least a first wedging sleeve is provided and is disposed about the first coupling end of the spindle. The first wedging sleeve conforms to the shapes of both the first coupling end of the spindle and the hollow cavity in the first socket. Either the coupling end of the spindle or the hollow cavity is axially tapered, and the wedging sleeve is tapered to match.

Abstract: A bicycle sprocket crank assembly is comprised of first and second crank arms joined to a spindle. One of the crank arms and the spindle may be fabricated as a unitary structure, or both cranks arms may be formed as separate structures and joined together. In either case the spindle has at least a first coupling end with an internally tapped axial bore defined therein and the second crank arm forms at least a first socket at its axle end. At least a first wedging sleeve is provided and is disposed about the first coupling end of the spindle. The first wedging sleeve conforms to the shapes of both the first coupling end of the spindle and the hollow cavity in the first socket. Either the coupling end of the spindle or the hollow cavity is axially tapered, and the wedging sleeve is tapered to match.

Abstract: A variable length, pedal driven, crank mechanism, suitable for use on human powered vehicles; with gear driven transmission assemblies mounted on each end of an axle which is supported by and rotates on bearings. These arms have an inner and outer housing that bolt together forming rigid sealed assemblies, each containing a train of gears that engage the fixed, non rotating, pinion gears, transferring rotation to the proximal drive gears. The proximal gears have splined shafts that extend outside the primary housings on which secondary outer crank arms are attached. The outer crank arms are internally threaded on the side of their proximal ends for the attachment of pedals. This assembly causes the outer arms to extend and increases the amount of torque available to the operator.

Abstract: A bicycle pedal assembly includes a pedal body having a sleeve tube and front and rear protruding portions. A front clamping member is mounted rotatably on the front protruding portion, and is biased by a front biasing member to rotate toward the sleeve tube. A locking member is connected to the front protruding portion, and is operable to abut against the front clamping member so as to lock the latter against rotational movement. A rear clamping member is mounted rotatably on the rear protruding portion, and is biased by a rear biasing member to rotate toward the sleeve tube. An adjusting member is connected to the rear clamping member, and is operable to adjust the biasing force of the rear biasing member.

Abstract: A bicycle crank arm assembly is provided with a bicycle crank arm with a first end configured to be coupled to an axle of a bottom bracket and a second end with a pedal attachment bore for receiving a bicycle pedal shaft. A tubular member is press fitted into the bore of the bicycle crank arm. The tubular member has an external circumferential with serrations that is surface non-releasably press fitted into the pedal attachment bore of the bicycle crank arm, and an internally threaded surface adapted to be coupled to the bicycle pedal shaft. The crank arm preferably has a counterbore at one axial end of the pedal attachment bore with a washer disposed therein such that the washer partially overlaps the tubular member.