Abstract: A coupling profile is provided having in a plane transversal to an axis (X) of the bottom bracket, outer arcs belonging to the same outer circumference of the coupling, each of such outer arcs being flanked and filleted on one side to a power transmission line and on the opposite side to an idle line. The power transmission line and the idle line are asymmetrical to each other with respect to the outer arc that separates them.

Abstract: A method for electronically servo-assisting a bicycle gearshift, including the steps of: a) driving an actuator of a bicycle gearshift to displace a chain of the gearshift in an axial direction with respect to a gearshift group comprising at least two sprockets; b) receiving information on the desired alignment between the chain and a predetermined sprocket of the gearshift group; and c) setting a biunique correspondence between the physical position of the actuator at step b) and a logic value associated with the gear ratio relative to the predetermined sprocket.

Abstract: A gear change control device for a bicycle having a handlebar with straight end portions, comprises a first control lever with a control portion arranged behind the end portion of the handlebar, with reference to the longitudinal direction of the bicycle, and extending at least partially at a position lying substantially at the same level of the handlebar, with respect to a vertical direction in the condition of use of the handlebar and a second control lever with a control portion arranged at the same level, below or upper the control portion of the first control lever.

Abstract: A method for carrying out gearshifting of a bicycle derailleur through an actuation device is described that utilizes a mobile mechanical member to control the derailleur. Every gearshifting operation corresponds to a movement of predetermined amount of the mobile member. The method is carried out by the steps of an active initial movement of the mobile member for a first amount equal to only a portion of the amount of the movement corresponding to gearshifting; and an automatic final movement of the mobile member for a second amount equal to the remaining portion of the amount of the movement corresponding to gearshifting. Devices capable of implementing such a method are also described.

Abstract: An integrated control device for a bicycle with curved handlebars is particularly ergonomic and which easily permits simultaneous braking and gear shifting operations, in particular towards lower gear ratios. In the integrated control device, the gearshift control levers are provided with actuating portions that the cyclist's fingers can reach one from one side of the support and the other from the other side of the support, and are placed in positions out of the reach of the brake lever.

Abstract: A method for electronically servo-assisting a bicycle gearshift to allow compensation for misalignments between the chain of a bicycle gearshift and one or more sprockets of the gearshift, the method including the steps of: driving an actuator of a bicycle gearshift to displace a chain of the gearshift in a chosen direction with respect to a gearshift group comprising at least two sprockets; receiving information on the desired alignment between the chain and a predetermined sprocket of the gearshift group; and setting an adjustment variable, of a logic value associated with the gear ratio relative to the predetermined sprocket, to a value corresponding to the displacement carried out in the step of driving the actuator.

Abstract: A coupling profile has, in a plane transversal to the axis of the bottom bracket, outer arcs belonging to the same outer circumference of the coupling, each of such outer arcs being flanked and filleted on one side to a power transmission line and on the opposite side to an idle line, in which the power transmission line and the idle line are symmetrical with respect to the outer arc that separates them. The outer arc has an angular extension about the axis of the bottom bracket equal to at least one tenth of the angular extension of the power transmission line, and the power transmission line and the idle line are filleted to the outer arc according to an angle smaller than 45°.

Abstract: To facilitate the mounting procedure of a brake pad in a brake shoe, it is provided for the undercut coupling between brake pad and brake shoe not to occur along their entire length. The brake pad can then be mounted in the brake shoe by means of a first movement for bringing at least one undercut section into abutment against a non-undercut section, and a second movement of mutual sliding, guided and stabilized by the abutment relationship obtained by the first movement, thus further reducing the risk of damage to the brake pad. Also, the second movement of mutual sliding only takes place over a shorter stroke than the full length of the brake pad and the brake shoe, which is a particularly advantageous feature when the relative sizes of the cross-sections are such as to create a coupling with mechanical interference.

Abstract: A bicycle gear-shift actuator having an articulated quadrilateral support with four connecting rods hinged together by four pin elements, and a motor member, having a variable length output shaft that travels along a drive axis between two opposite pin elements to move them for deforming the articulated quadrilateral. Preferably, the drive axis perfectly intersects the pin axis of at least one of the two pin elements.

Abstract: The described actuation device comprises a housing, intended for attachment to the handlebars or to the frame of a bicycle, a cable-winding bobbin, angularly mobile in the housing about a main axis (X) of the device, and support means of the bobbin in the housing. Such support means comprise a first support unit at an outer guide collar of the cable-winding bobbin, situated in an intermediate position of the bobbin in the direction of the main axis (X) of the device. An excellent distribution of the stresses between the bobbin and the housing is thus ensured, substantially reducing the risks of excessive deformation and breaking.

Abstract: A method for electronically servo-assisting a bicycle gearshift to allow compensation for misalignments between the chain of a bicycle gearshift and one or more sprockets of the gearshift, the method including the steps of: driving an actuator of a bicycle gearshift to displace a chain of the gearshift in an axial direction with respect to a gearshift group comprising at least two sprockets; receiving information on the desired alignment between the chain and a predetermined sprocket of the gearshift group; and setting an adjustment variable, of a logic value associated with the gear ratio relative to the predetermined sprocket, to a value corresponding to the displacement carried out in the step of driving the actuator.

Abstract: Rocker arm assembly for the rear derailleur of a bicycle, comprising an outer plate (12) carrying a pivot pin (32), an inner plate (10) and a pair of idle transmission wheels (14) arranged between the outer plate (12) and the inner plate (10). The inner plate is made of metallic material and the outer plate is made of a structural fiber fabric incorporated in a thermoplastic material matrix.

Abstract: Rocker arm assembly for the rear derailleur of a bicycle, comprising an outer plate carrying a pivot pin, an inner plate and a pair of idle transmission wheels arranged between the outer plate and the inner plate. The inner plate is made of metallic material and the outer plate is made of a structural fiber fabric incorporated in a thermoplastic material matrix.

Abstract: The described actuation device comprises a casing, intended for the attachment to the handlebar of the bicycle, a cable-winding bobbin, angularly mobile in the casing about a main axis of the device, a first driving mechanism, acting on the bobbin to rotate it in a first angular direction, a second driving mechanism, acting on the bobbin to rotate it in a second angular direction opposite the first, as well as indexer assembly for removably holding the bobbin in predetermined angular positions. In accordance with the invention, the indexer assembly comprise first countering means, to counter the rotation of the bobbin in the first direction, and second countering means, distinct from the first countering means, to counter the rotation of the bobbin in the second direction. Asymmetric operation is thus obtained which allows active actuation to be set both for upward gearshifting and for downward gearshifting.

Abstract: A method for electronically servo-assisting a bicycle gearshift to allow compensation for misalignments between the chain of a bicycle gearshift and one or more sprockets of the gearshift, the method including the steps of: driving an actuator of a bicycle gearshift to displace a chain of the gearshift in a chosen direction with respect to a gearshift group comprising at least two sprockets; receiving information on the desired alignment between the chain and a predetermined sprocket of the gearshift group; and setting an adjustment variable, of a logic value associated with the gear ratio relative to the predetermined sprocket, to a value corresponding to the displacement carried out in the step of driving the actuator.

Abstract: An electronic control system for a bicycle comprising a first containment unit for an electronic device or for a power supply device and a second containment unit for a power supply device or for an electronic device. The two units are mechanically removably connected to each other through snap fastening means provided with an actuation button.

Abstract: A covering hood for a bicycle component that is gripped or grasped when in use is provided. The hood may be used, for example, for covering a supporting body of an integrated device for controlling the brake and derailleur of a bicycle. The hood comprises areas with differentiated compliance.

Abstract: A control device for a bicycle derailleur has a supporting body that can be fixed to the handlebar and which can be gripped by the cyclist and which has an internal side wall and an external side wall, which are substantially parallel to the plane of a respective curved end of the handlebar. The device has an actuator for actuating the derailleur towards higher or lower gear ratios, controlled by means of one a first and one a second control member. The two control members are both arranged on the internal side wall of the supporting body, in a position that can be reached by the cyclist's thumb when his hand is in its normal operating position.

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 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.