The invention relates to an actuation device for actuating the front derailleur of a bicycle, comprising a control pin, configured to be set in rotation by a control lever, rotatable about a rotation axis in a first angular direction between the first and last angular positions and in a second angular direction between the last and the first angular positions. A cable-winding bush rotates between the first and last winding positions. An indexer has a plurality of stop areas corresponding to angular positions between the first and the last angular positions. Elastic members makes the control pin form a unit with the cable-winding bush during rotations of the cable-winding bush between and among the various winding positions and to make the control pin rotatable with respect to the cable-winding bush between the last winding position of the cable-winding bush and the last angular position of the control pin.

The invention relates to an actuation device for actuating the front derailleur of a bicycle, comprising a control pin, configured to be set in rotation by a control lever, rotatable about a rotation axis in a first angular direction between the first and last angular positions and in a second angular direction between the last and the first angular positions. A cable-winding bush rotates between the first and last winding positions. An indexer has a plurality of stop areas corresponding to angular positions between the first and the last angular positions. Elastic members makes the control pin form a unit with the cable-winding bush during rotations of the cable-winding bush between and among the various winding positions and to make the control pin rotatable with respect to the cable-winding bush between the last winding position of the cable-winding bush and the last angular position of the control pin.

An embodiment of the invention provides an electromechanical rear derailleur for a bicycle including a base member that is configured to be coupled to a frame member of a bicycle. The derailleur includes a movable member and a link mechanism that movably couples the movable member to the base member. A motor is positioned at the movable member to move the movable member.

An embodiment of the invention provides an electromechanical rear derailleur for a bicycle including a base member that is configured to be coupled to a frame member of a bicycle. The derailleur includes a movable member and a link mechanism that movably couples the movable member to the base member. A motor is positioned at the movable member to move the movable member.

A bicycle front derailleur is provided that can be easily coupled to a bicycle frame. The bicycle front derailleur includes a base member, a chain guide and a link mechanism. The base member is configured to be coupled to a bottom bracket hanger of the bicycle frame. The chain guide is configured to guide a chain. The link mechanism connects the chain guide to the base member to move the chain guide between a retracted position and an extended position. The base member includes a recess configured to accommodate a part of the chain guide in a state where the chain guide is located at the retracted position.

A bicycle electric front derailleur is disclosed that includes a support body that is configured to be attached to a frame of the bicycle, a chain guide connected to the support body through a linkage, an electric motor that drives the linkage to displace the chain guide among toothed wheels of a motion transmission system, and a battery power supply unit. The battery power supply unit is supported by the chain guide.

A bicycle front derailleur that is movable between shift positions in association with an indexer. The inner mechanical end stop is adjusted at the first indexing position so there is no loosening of the control cable in the last downward gearshifting operation, with the benefit of an immediate and rapid response in the first upward gearshifting operation. The outer end stop is adjusted to interrupt the rotation of the cable-winding bush before it reaches the last indexing position. This pair of mechanical end stops limits the excursion of the derailleur to prevent it being able to shift the chain too much towards the frame or too much away from the frame, which ensures that the chain is not shifted beyond the gears.

The invention relates to an actuation device for actuating the front derailleur of a bicycle, comprising a control pin, configured to be set in rotation by a control lever, rotatable about a rotation axis in a first angular direction between the first and last angular positions and in a second angular direction between the last and the first angular positions. A cable-winding bush rotates between the first and last winding positions. An indexer has a plurality of stop areas corresponding to angular positions between the first and the last angular positions. Elastic members makes the control pin form a unit with the cable-winding bush during rotations of the cable-winding bush between and among the various winding positions and to make the control pin rotatable with respect to the cable-winding bush between the last winding position of the cable-winding bush and the last angular position of the control pin.

The invention relates to an actuation device for actuating the front derailleur of a bicycle, comprising a control pin, configured to be set in rotation by a control lever, rotatable about a rotation axis in a first angular direction between the first and last angular positions and in a second angular direction between the last and the first angular positions. A cable-winding bush rotates between the first and last winding positions. An indexer has a plurality of stop areas corresponding to angular positions between the first and the last angular positions. Elastic members makes the control pin form a unit with the cable-winding bush during rotations of the cable-winding bush between and among the various winding positions and to make the control pin rotatable with respect to the cable-winding bush between the last winding position of the cable-winding bush and the last angular position of the control pin.

An electronic rear derailleur for a bicycle, includes a base member for attachment to a frame member of the bicycle, and a movable member having a cage assembly attached thereto. The electronic rear derailleur may also include a linkage coupling the movable member to the base member and configured to permit movement of the movable member relative to the base member, and a motor positioned at the movable member, the motor configured to operate the linkage to move the movable member relative to the base member.