The disclosure relates to a derailleur assembly including a base member, a movable member, a driving module and a power module he driving module includes a casing and a motor, wherein the casing is pivotably disposed on the base member via a first pivot shaft, the casing is pivotably disposed on the movable member via a second pivot shaft, and the motor is disposed in the casing. The power module includes a base body and a battery assembly, wherein the base body is pivotably disposed on the base member via a third pivot shaft, the base body is pivotably disposed on the movable member via a fourth pivot shaft, and the battery assembly is disposed on the base body and is electrically connected to the motor.

The disclosure relates to a derailleur assembly including a base member, a movable member, a driving module and a power module he driving module includes a casing and a motor, wherein the casing is pivotably disposed on the base member via a first pivot shaft, the casing is pivotably disposed on the movable member via a second pivot shaft, and the motor is disposed in the casing. The power module includes a base body and a battery assembly, wherein the base body is pivotably disposed on the base member via a third pivot shaft, the base body is pivotably disposed on the movable member via a fourth pivot shaft, and the battery assembly is disposed on the base body and is electrically connected to the motor.

A bracket element configured for installation on an axial inner side of an associated bracket portion of a bicycle frame for the purposes of installing a rear gearshift mechanism of a derailleur system on the bicycle frame is provided. The bracket element may include a first portion, which has an opening or aperture assigned to the axle and which, in the installed state, is subjected to a clamping force which acts between the rear bracket portion. The bracket element may also include a second portion having an installation opening which is radially offset in relation to the opening or aperture in the installed state with respect to the axis and to which an attachment end of a base element of the rear gearshift mechanism is fixable.

A bracket element configured for installation on an axial inner side of an associated bracket portion of a bicycle frame for the purposes of installing a rear gearshift mechanism of a derailleur system on the bicycle frame is provided. The bracket element may include a first portion, which has an opening or aperture assigned to the axle and which, in the installed state, is subjected to a clamping force which acts between the rear bracket portion. The bracket element may also include a second portion having an installation opening which is radially offset in relation to the opening or aperture in the installed state with respect to the axis and to which an attachment end of a base element of the rear gearshift mechanism is fixable.

A guide element for bicycle drive means includes a main bearing pin for fixing a swing arm bearing. Further, a spacer sleeve is provided which is arranged on the main bearing pin for reducing a distance between a drive ring and a bicycle frame element.

A guide element for bicycle drive means includes a main bearing pin for fixing a swing arm bearing. Further, a spacer sleeve is provided which is arranged on the main bearing pin for reducing a distance between a drive ring and a bicycle frame element.

A bicycle derailleur comprises a base member, a movable member, a chain guide, and a resistance applying structure. The chain guide is rotatably coupled to the movable member about a pivot axis. The resistance applying structure includes a rotational one-way clutch and an elastic portion. The rotational one-way clutch includes a first engagement member and a second engagement member. The first engagement member has a first axially facing surface and a first engagement profile provided to the first axially facing surface. The second engagement member has a second axially facing surface and a second engagement profile provided to the second axially facing surface. The elastic portion is provided to at least one of the first axially facing surface of the first engagement member and the second axially facing surface of the second engagement member.

A bicycle derailleur comprises a base member, a movable member, a chain guide, and a resistance applying structure. The chain guide is rotatably coupled to the movable member about a pivot axis. The resistance applying structure includes a rotational one-way clutch and an elastic portion. The rotational one-way clutch includes a first engagement member and a second engagement member. The first engagement member has a first axially facing surface and a first engagement profile provided to the first axially facing surface. The second engagement member has a second axially facing surface and a second engagement profile provided to the second axially facing surface. The elastic portion is provided to at least one of the first axially facing surface of the first engagement member and the second axially facing surface of the second engagement member.

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.

A device for the selective positioning of the pivot of a wheel of a bicycle comprising a frame composed of a rear stay provided with a first pair of first oblique rear chainstays, each connected, respectively by means of a triangular support, to a second pair of two second horizontal rear chainstays, a derailleur hook being associable with the first and second chainstays.

First external seats and second internal seats are provided for the axial and removable positioning respectively of a first external adapter and of a second internal adapter.

The first and second adapter have respectively a second hole and a third hole, adapted to determine two different axial arrangements of the derailleur hook and of the pivot with respect to the two first and second chainstays and are adapted to keep the derailleur hook locked in clockwise rotation and free to rotate counterclockwise only through a chosen arc.