A rear derailleur includes a base member, a movable member, a link and a chain guide. The link is connected to the base member about a first link axis and to the movable member about a second link axis. The chain guide is mounted to the movable member about a tension pivot axis. The chain guide includes a first pulley having a first rotational axis and a second pulley having a second rotational axis. The tension pivot axis is substantially parallel to the first and second rotational axes. A first reference line defines a distance between the tension pivot axis and the first rotational axis with a range between 2 to 70 millimeters. The first link axis and a reference plane define an angle ranging from 3 to 35 degrees. The first reference line and a second reference line define an angle ranging from 20 to 170 degrees.

A rear derailleur includes a base member, a movable member, a link and a chain guide. The link is connected to the base member about a first link axis and to the movable member about a second link axis. The chain guide is mounted to the movable member about a tension pivot axis. The chain guide includes a first pulley having a first rotational axis and a second pulley having a second rotational axis. The tension pivot axis is substantially parallel to the first and second rotational axes. A first reference line defines a distance between the tension pivot axis and the first rotational axis with a range between 2 to 70 millimeters. The first link axis and a reference plane define an angle ranging from 3 to 35 degrees. The first reference line and a second reference line define an angle ranging from 20 to 170 degrees.

A bicycle derailleur includes a base member mountable to a bicycle frame and a cage assembly moveably coupled to the base member. One or both of a motor and/or electrical generator system may be coupled to and moveable with the cage assembly. The motor is operable to move the cage assembly. The electrical generator system includes a generator and a generator drive system.

A bicycle derailleur includes a base member mountable to a bicycle frame and a cage assembly moveably coupled to the base member. One or both of a motor and/or electrical generator system may be coupled to and moveable with the cage assembly. The motor is operable to move the cage assembly. The electrical generator system includes a generator and a generator drive system.

A bicycle electric/electronic derailleur has a plurality of mutually movable components: a support body configured to be attached to a bicycle frame, a chain guide, and a pair of connecting arms, for connection between the support body and the chain guide at respective geometric articulation axes. A geared motor controls the motion of the plurality of mutually movable components. At least one first component has a case with a chamber containing the geared motor and/or one or more electric/electronic devices. The chamber crosses at least one articulation axis. The case comprises a blind hole that is coaxial with the one axis and open outwards of the case. A second component has a pivot pivotable in the blind hole.

A bicycle electric/electronic derailleur has a plurality of mutually movable components: a support body configured to be attached to a bicycle frame, a chain guide, and a pair of connecting arms, for connection between the support body and the chain guide at respective geometric articulation axes. A geared motor controls the motion of the plurality of mutually movable components. At least one first component has a case with a chamber containing the geared motor and/or one or more electric/electronic devices. The chamber crosses at least one articulation axis. The case comprises a blind hole that is coaxial with the one axis and open outwards of the case. A second component has a pivot pivotable in the blind hole.

The invention relates to an electromechanical derailleur for mounting on a rear wheel axis. The derailleur has a stationary element, a pivoting mechanism, a movable element having a chain guide arrangement, and a gearing housing. The gearing housing receives an electromechanical drive for driving the pivoting mechanism. The stationary element defines a housing void in which the gearing housing is disposed, and has a fastener for a power source. The power source is fastened to the stationary element such that said power source is electrically connected to the electromechanical drive in the gearing housing.

The invention relates to an electromechanical derailleur for mounting on a rear wheel axis. The derailleur has a stationary element, a pivoting mechanism, a movable element having a chain guide arrangement, and a gearing housing. The gearing housing receives an electromechanical drive for driving the pivoting mechanism. The stationary element defines a housing void in which the gearing housing is disposed, and has a fastener for a power source. The power source is fastened to the stationary element such that said power source is electrically connected to the electromechanical drive in the gearing housing.

An electronic automatically decoupling hub assembly is disclosed herein. The assembly has an axle and a hub shell rotationally positioned about the axle. A controller provides automatic activation/deactivation signals to an inductor. The assembly has a bearing rotationally positioned about the axle and a ratchet ring, having a plurality of teeth, rotationally positioned about the bearing. One or more pawls are provided to engage with at least some of the teeth of the ratchet ring and a seal is used to contain the pawls within the assembly. A cassette body assembly is coupled with the ratchet ring and an end cap is used to prevent a contaminant from entering into the decoupling hub assembly.

A derailleur basically includes a base member, a movable member and a linkage assembly. The base member includes a first base member connecting section and a second base member connecting section. The movable member includes a first movable member connecting section and a second movable member connecting section. The linkage assembly includes an inner link member and an outer link member. The outer link is pivotally coupled to the second base member connecting section about a third pivot axis. The outer link is pivotally coupled to the second movable member connecting section about a fourth pivot axis. The outer link member has a power source receiving part that is configured to be arranged such that the power source receiving part traverses a reference line extending between the third pivot axis and the fourth pivot axis.