A bicycle front shifting system includes operable to transmit a wireless signal, a crank assembly with two crank arms and a pedal on each of the two crank arms. The crank assembly is rotatable about a rotation axis. A front shift unit is coupled to the crank assembly and is rotatable about the rotation axis. The front shift unit includes a chain ring component with a big chain ring and a small chain ring. The small chain ring has a small diameter and the big chain ring has a big diameter that is larger than the small diameter. A shift mechanism is coupled to and rotatable with the chain ring component about the rotation axis. The shift mechanism is configured to receive the wireless signal from the shifter and to shift a chain between the big chain ring and the small chain ring according to the wireless signal.

A bicycle front derailleur is provided, including: a base, configured to be mounted to a bicycle frame; a linkage mechanism, including a connection portion configured to be connected with a cable, the linkage mechanism being swingably connected to the base; a chain guide, swingably connected to the linkage mechanism; and an adjustment assembly, disposed on the base, including a holder movably disposed on the base and an adjustment member, the holder being configured to be connected with a sheath for driving the cable, the adjustment member being movably disposed on the base and adjustable to drive the holder to move relative to the base.

A bicycle front derailleur is provided, including: a base, configured to be mounted to a bicycle frame; a linkage mechanism, including a connection portion configured to be connected with a cable, the linkage mechanism being swingably connected to the base; a chain guide, swingably connected to the linkage mechanism; and an adjustment assembly, disposed on the base, including a holder movably disposed on the base and an adjustment member, the holder being configured to be connected with a sheath for driving the cable, the adjustment member being movably disposed on the base and adjustable to drive the holder to move relative to the base.

A motorized bicycle gearshift that is movable between first and second operative configurations and includes a pre-loaded elastic element that is responsive to gearshift changes between the first and second operative conditions.

A motorized bicycle gearshift that is movable between first and second operative configurations and includes a pre-loaded elastic element that is responsive to gearshift changes between the first and second operative conditions.

The present disclosure describes a gearshift mechanism for adjusting a gear ratio between a traction means, such as a chain, and a multi-sprocket gear set which can be rotated around an axle. The gearshift mechanism is configured to move the traction means in relation to the sprockets, such that an adjustment element is moved into the rolling motion of the traction means, thereby causing movement off of one sprocket and movement onto another sprocket.

The present disclosure describes a gearshift mechanism for adjusting a gear ratio between a traction means, such as a chain, and a multi-sprocket gear set which can be rotated around an axle. The gearshift mechanism is configured to move the traction means in relation to the sprockets, such that an adjustment element is moved into the rolling motion of the traction means, thereby causing movement off of one sprocket and movement onto another sprocket.

A bicycle front derailleur includes a base member to be mounted to a bicycle frame, a chain guide, a first link pivotally connected to the chain guide about a first pivot axis, and a second link pivotally connected to the chain guide about a second pivot axis. The chain guide includes a link-connecting structure pivotally connected to the first link. The link-connecting structure includes a first link-connecting portion and a second link-connecting portion. The first link includes a first chain guide-connecting portion and a second chain guide-connecting portion. At least one of the first link-connecting portion and the second link-connecting portion is located between the first chain guide-connecting portion and the second chain guide-connecting portion.

A bicycle front derailleur includes a base member to be mounted to a bicycle frame, a chain guide, a first link pivotally connected to the chain guide about a first pivot axis, and a second link pivotally connected to the chain guide about a second pivot axis. The chain guide includes a link-connecting structure pivotally connected to the first link. The link-connecting structure includes a first link-connecting portion and a second link-connecting portion. The first link includes a first chain guide-connecting portion and a second chain guide-connecting portion. At least one of the first link-connecting portion and the second link-connecting portion is located between the first chain guide-connecting portion and the second chain guide-connecting portion.

An automatic bicycle drive train shifting apparatus comprising a bicycle drive chain derailer powered by a servo gearmotor slaved to an electronic control system and controlled through a highly adaptable user interface serving to automatically alternate drive chain position between available bicycle drive sprockets under user defined shifting criteria adaptable in real time to rider conditioning, comfort level and road conditions thereby alleviating manual shifting tasks and achieving optimal pedal rate and effort settings for the rider.