A bicycle rear derailleur has a base member mountable to a bicycle frame, a movable member movably coupled to the base member, a chain guide assembly rotatably connected to the movable member for rotation about a rotational axis, a biasing element configured and arranged to bias the chain guide assembly for rotation in a first rotational direction with respect to the movable member, and a fluid damper having a fluid cavity containing a volume of fluid. The fluid damper is operatively disposed between the chain guide assembly and the movable member to apply a damping force to the chain guide assembly when the chain guide assembly rotates in a second rotational direction opposite to the first rotational direction. The fluid damper has a guide wheel configured to route a chain and rotatable about the rotational axis.

Disclosed herein is a transmission assembly for a wheeled vehicle. The assembly has a gear box superposed over an existing prior art bicycle. Based on the gear ratios of the gear box, the power input of a rider is increased in the same amount.

A bicycle gearshift including a first body associated with a bicycle frame, a second body connected to, and moveable relative to, the first body, a rocker arm rotatably connected to the second body at a rotation axis, and a shaft extending coaxially to this axis and fixedly associated with the rocker arm. A unidirectional rotation device is arranged between the shaft and second body to allow rotation of the shaft relative to the second body only in a first rotation direction. An elastic element is associated with the second body and the rocker arm to push the rocker arm in rotation about the axis in the first rotation direction. A damping device is arranged between the shaft and unidirectional rotation device to generate a friction force when the rocker arm is rotated in a second, opposite rotation direction, and has a friction surface in contact with the unidirectional rotation device.

A bicycle includes a frame, a rear wheel, a suspension system that allows a predetermined relative movement therebetween, and a drivetrain system. The drivetrain system includes a crankset fixed to the frame, a hub and pinion assembly fixed to the rear wheel rotatable about a common pivot axis thereof, and a drive chain placed to connect them directly to each other. The crankset and the hub and pinion assembly are subjected to mutual movement by the action of the suspension system, where at least one among the crankset and the hub and pinion assembly includes a free stroke device that allows both an outbound and inbound free angular stroke of the chain with respect to the respective pivot axes of the crankset and/or of the hub and pinion assembly. The angular stroke is limited by a predetermined angle of entity related to the movement between the wheel and frame.

A bicycle includes a frame, a rear wheel, a suspension system that allows a predetermined relative movement therebetween, and a drivetrain system. The drivetrain system includes a crankset fixed to the frame, a hub and pinion assembly fixed to the rear wheel rotatable about a common pivot axis thereof, and a drive chain placed to connect them directly to each other. The crankset and the hub and pinion assembly are subjected to mutual movement by the action of the suspension system, where at least one among the crankset and the hub and pinion assembly includes a free stroke device that allows both an outbound and inbound free angular stroke of the chain with respect to the respective pivot axes of the crankset and/or of the hub and pinion assembly. The angular stroke is limited by a predetermined angle of entity related to the movement between the wheel and frame.

A pedal driven cycle comprising a cantilevered frame member coupled to a power input sprocket and a driven sprocket; a belt drive connecting the power input sprocket to the driven sprocket; and a side mounted rear wheel releasably coupled to a multi-speed gear hub that is coaxial with the side mounted rear wheel, wherein the multi-speed gear hub is coupled to the driven sprocket.

A pedal driven cycle comprising a cantilevered frame member coupled to a power input sprocket and a driven sprocket; a belt drive connecting the power input sprocket to the driven sprocket; and a side mounted rear wheel releasably coupled to a multi-speed gear hub that is coaxial with the side mounted rear wheel, wherein the multi-speed gear hub is coupled to the driven sprocket.

Bicycle belt or chain drive tensioning systems and IGH-thru-axle conversion systems are described that includes first and second anti-rotation keys, a bushing, and first and second fasteners configured to center the IGH laterally within first and second dropouts of the bicycle. The belt or chain tensioning device includes a mounting clamp, a swing arm assembly with a stepped pivot shaft, a swing arm, a first pulley rotatably supported by the pivoted shaft, and a second pulley rotatably attached to the swing arm, the first pulley and the swing arm rotating about a longitudinal axis of the stepped pivot shaft. Methods for assembly and operation of such systems are also disclosed.

Bicycle belt or chain drive tensioning systems and IGH-thru-axle conversion systems are described that includes first and second anti-rotation keys, a bushing, and first and second fasteners configured to center the IGH laterally within first and second dropouts of the bicycle. The belt or chain tensioning device includes a mounting clamp, a swing arm assembly with a stepped pivot shaft, a swing arm, a first pulley rotatably supported by the pivoted shaft, and a second pulley rotatably attached to the swing arm, the first pulley and the swing arm rotating about a longitudinal axis of the stepped pivot shaft. Methods for assembly and operation of such systems are also disclosed.

The present invention provides a stabilizer, which comprises a receiving device; a guide plate element for connection with a chain, the guide plate element being movably mounted on the receiving device and performing a rotation state through an elastic element; and a clutch device mounted on the receiving device and connected with the guide plate element and used for providing one-way resistance when the guide plate element moves relative to the receiving device. When a vehicle body jounces, the guide plate element rotates upwardly under force, the chain is tensioned, and the clutch device is in a free rotation state. When the guide plate element moves towards an opposite direction under an action of force, the clutch device provides one-way resistance, so that the guide plate element can maintain a tensioning state of the chain for a longer time, and the effect of stabilizing the chain is achieved.