A derailleur comprises a base member configured to be attached to a human-powered vehicle frame, a movable member movable with respect to the base member, a pulley assembly pivotally attached to the movable member in a first pivotal direction and a second pivotal direction opposite to the first pivotal direction and including a first pulley having a first pulley axis and a second pulley having a second pulley axis, a pulley assembly biasing member configured to bias the pulley assembly with respect to the movable member in the first pivotal direction, a pulley distance (centimeter) being defined between the first pulley axis and the second pulley axis, a biasing return force (newton) being defined by rotational force of the pulley assembly relative to the movable member, and a return value defined by the biasing return force multiplied by the pulley distance. The return value is 136 or larger.

A derailleur comprises a base member, a movable member, a linkage structure, a pulley assembly, and a rotational force control structure configured to control rotational force of the pulley assembly relative to the movable member. The pulley assembly is pivotally movable relative to the movable member about a pivot axis in first and second directions. The pulley assembly is configured to move in the first direction upon moving from a second pivotal position toward a first pivotal position. The rotational force control structure includes a cam member having a first cam surface, an abutment member configured to abut the first cam surface, and a biasing member configured to bias the abutment member. The abutment member is configured to abut the first cam surface by the biasing member to apply first additional force to the pulley assembly in the first direction while the pulley assembly is in the first pivotal position.

A derailleur comprises a base member, a movable member, a linkage structure, a pulley assembly, and a rotational force control structure configured to control rotational force of the pulley assembly relative to the movable member. The pulley assembly is pivotally movable relative to the movable member about a pivot axis in first and second directions. The pulley assembly is configured to move in the first direction upon moving from a second pivotal position toward a first pivotal position. The rotational force control structure includes a cam member having a first cam surface, an abutment member configured to abut the first cam surface, and a biasing member configured to bias the abutment member. The abutment member is configured to abut the first cam surface by the biasing member to apply first additional force to the pulley assembly in the first direction while the pulley assembly is in the first pivotal position.

A derailleur comprises a base member configured to be attached to a human-powered vehicle frame, a movable member movable relative to the base member, a pulley assembly configured to be pivotally attached to the movable member with respect to a pivot axis, and a biasing member configured to apply biasing force to the pulley assembly. The biasing member includes a first biasing member and a second biasing member.

A derailleur comprises a base member configured to be attached to a human-powered vehicle frame, a movable member movable relative to the base member, a pulley assembly configured to be pivotally attached to the movable member with respect to a pivot axis, and a biasing member configured to apply biasing force to the pulley assembly. The biasing member includes a first biasing member and a second biasing member.

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.

The disclosure provides a bicycle rear derailleur including a linkage assembly, a chain guiding assembly, a first assembling component, a first elastic component and a locking mechanism. The linkage assembly is a four-link mechanism and includes a fixed component, a movable component, a first link and a second link. The chain guiding assembly is pivotably connected to the movable component. The first assembling component is pivotably connected to the movable component and disposed between the first assembling component and the chain guiding assembly. The opposite ends of the first elastic component are respectively fixed to the movable component and the first assembling component so as to provide a torque that allows the first assembling component to be pivotable with respect to the movable component.

The disclosure relates to an electromechanical rear derailleur for coaxial assembling on a rear wheel axle. The derailleur has a base element, a pivot mechanism, and a movable element having a chain guide assembly. The chain guide assembly is connected to the movable element so as to be rotatable about a rotation axis. A blocking device permits the chain guide assembly to be established relative to the movable element. The blocking device is able to be inserted into the movable element in two different positions.

The disclosure relates to an electromechanical rear derailleur for coaxial assembling on a rear wheel axle. The derailleur has a base element, a pivot mechanism, and a movable element having a chain guide assembly. The chain guide assembly is connected to the movable element so as to be rotatable about a rotation axis. A blocking device permits the chain guide assembly to be established relative to the movable element. The blocking device is able to be inserted into the movable element in two different positions.