A bicycle gearshift mechanism has a base element, a pivot mechanism, a movable element, and a chain guide arrangement. The pivot mechanism connects the base element to the movable element. The chain guide arrangement is connected, rotatably about a rotary axle, to the movable element. The base element comprises a first attachment end, which is coaxial with respect to the rear-wheel axle or axis, and a second attachment end for coupling to the pivot mechanism.

The disclosure relates to a chain roller for a rear bicycle gearshift mechanism. The chain roller comprising a rotatory bearing, a toothed ring with teeth formed thereon, and a support structure which connects the rotary bearing and the toothed ring. The toothed ring and support structure are formed from different materials and are connected to one another radially and axially.

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.

An electric tricycle including a frame having a front end coupled to a steering assembly, the steering assembly having a front wheel, and a rear end coupled to a rear wheel assembly, the rear wheel assembly having two rear wheels. At least two pedals rotatably coupled to the rear wheel assembly and configured to move in a reciprocating motion, the at least two pedals having an engaged configuration wherein the at least two pedals are engaged with the two rear wheels and configured to rotate the two rear wheels in a first direction, and a disengaged configuration wherein each of the at least two pedals is disengaged from the two rear wheels and aligned with another of the at least two pedals. An electric motor electrically coupled to a battery and configured to engage with the two rear wheels and to rotate the two rear wheels in the first direction.

A rear suspension system for bicycles comprised of a bicycle main frame, upper link, lower link, swingarm, and rotatable idler member. The rear wheel follows a primarily rearwards and upwards axle path which is determined by the specific linkage geometry. The idler member is fixed to the bicycle main frame at one precise location. This idler member is positioned in such a way as to redirect drivetrain forces to create highly stable anti-squat characteristics at the statically loaded sag point in every gear combination.

A chain guide is disclosed herein. The chain guide includes a backplate and a chain guide. The backplate has an elongated opening therein. The chain guide includes a guide to orient a chain with respect to the sprocket. The chain guide also includes a retaining assembly to removably and adjustably frictionally couple the guide at a given location along the elongated opening in the backplate, such that when the guide is rotated axially about the retaining assembly, the guide is retained at the given location.

A chain guide is disclosed herein. The chain guide includes a backplate and a chain guide. The backplate has an elongated opening therein. The chain guide includes a guide to orient a chain with respect to the sprocket. The chain guide also includes a retaining assembly to removably and adjustably frictionally couple the guide at a given location along the elongated opening in the backplate, such that when the guide is rotated axially about the retaining assembly, the guide is retained at the given location.

A bicycle gearshift mechanism has a base element, a pivot mechanism, a movable element, and a chain guide arrangement. The pivot mechanism connects the base element to the movable element. The chain guide arrangement is connected, rotatably about a rotary axle, to the movable element. The base element comprises a first attachment end, which is coaxial with respect to the rear-wheel axle or axis, and a second attachment end for coupling to the pivot mechanism

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.

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.