Abstract: A motor unit comprises a torque limiter and a transmitting structure. The torque limiter includes a first member and a second member. The first member and the second member are movable relative to each other in a state where a torque applied to the torque limiter is equal to or higher than a torque threshold. The first member and the second member are movable together with each other in a state where the torque is lower than the torque threshold. The transmitting structure includes a first race, a second race, a first intermediate element at least partially provided between the first race and the second race, and a second intermediate element at least partially provided between the first race and the second race.

Abstract: A bicycle component controller is basically provided with a processor. The processor is configured to perform a gear shift control based on a sprocket assembly information of at least one sprocket assembly. The sprocket assembly information at least includes a single shifting distance and shifting gate information. The single shifting distance corresponds to an axial spacing between adjacent sprockets of the at least one sprocket assembly.

Abstract: A bicycle derailleur includes a base member, a movable member, a link member, a chain guide, a biasing mechanism and a switching member. The link member movably couples the movable member to the base member. The chain guide is pivotally coupled to the movable member about a pivot axis. The biasing mechanism is operatively disposed between the movable member and the chain guide, and biases the chain guide with respect to the movable member about the pivot axis in a first direction in a biasing state. The switching member is configured to selectively switch the biasing mechanism between the biasing state and a releasing state. The biasing mechanism biases the chain guide less in the releasing state than the biasing state. The switching member is disengaged from the biasing mechanism in the biasing state. The switching member is engaged with the biasing mechanism in the releasing state.

Abstract: A motor unit comprises a torque limiter and a transmitting structure. The torque limiter includes a first member and a second member. The first member and the second member are movable relative to each other in a state where a torque applied to the torque limiter is equal to or higher than a torque threshold. The first member and the second member are movable together with each other in a state where the torque is lower than the torque threshold. The transmitting structure includes a first race, a second race, a first intermediate element at least partially provided between the first race and the second race, and a second intermediate element at least partially provided between the first race and the second race.

Abstract: A bicycle component includes a base member, a movable member, a link member, an actuator, and a battery holder. The link member movably couples the movable member to the base member. The actuator is operatively coupled to the link member to move the link member. The battery holder is detachably attached to the link member. The battery holder includes a battery holding portion configured to hold a battery and a flexible element electrically connecting the battery holding portion to the actuator.

Abstract: A bicycle component controller is basically provided with a processor. The processor is configured to perform a gear shift control based on a sprocket assembly information of at least one sprocket assembly. The sprocket assembly information at least includes a single shifting distance and shifting gate information. The single shifting distance corresponds to an axial spacing between adjacent sprockets of the at least one sprocket assembly.

Abstract: A bicycle sprocket comprises a sprocket body, a plurality of sprocket teeth, and a torque transmitting profile. The sprocket body has an outer periphery and an inner periphery positioned radially inwardly from the outer periphery with respect to a rotational center axis of the bicycle sprocket. The plurality of sprocket teeth is disposed on the outer periphery of the sprocket body. The torque transmitting profile is positioned around the inner periphery of the sprocket body. The torque transmitting profile includes at least ten internal spline teeth. The at least ten internal spline-teeth include at least one first internal spline-tooth, at least one second internal spline-tooth and at least one third internal spline-tooth. The at least one internal first spline-tooth, the at least one second internal spline-tooth and the at least one third internal spline-tooth are different in shape from each other.

Abstract: A bicycle component controller is basically provided with a data storage device and a processor. The data storage device contains sprocket assembly information of at least one sprocket assembly. The processor is configured to perform a gear shift control based on the sprocket assembly information. The sprocket assembly information of the at least one sprocket assembly at least includes a total sprocket number and shifting gate information. The single shifting distance of the sprocket assembly information corresponds to an axial spacing between adjacent sprockets of the at least one sprocket assembly.

Abstract: A bracket apparatus for mounting a derailleur to a frame of a human-powered vehicle comprises a frame attachment portion, a derailleur attachment portion spaced apart from the frame attachment portion, and a component attachment portion spaced apart from the frame attachment portion and the derailleur attachment portion.

Abstract: A bracket apparatus for mounting a derailleur to a frame of a human-powered vehicle comprises a bracket body and one of a restriction member and a restriction opening. The bracket body includes a frame attachment portion configured to be attached to the frame of the human-powered vehicle and a derailleur attachment portion to which the derailleur is to be attached. The restriction member is configured to be at least partly provided in the restriction opening to restrict a rotation of the bracket body relative to the frame of the human-powered vehicle in a bracket mounting state where the bracket apparatus is mounted to the frame of the human-powered vehicle.

Abstract: A bicycle component controller is basically provided with a data storage device and a processor. The data storage device contains sprocket assembly information of at least one sprocket assembly. The processor is configured to perform a gear shift control based on the sprocket assembly information. The sprocket assembly information of the at least one sprocket assembly at least includes a total sprocket number and shifting gate information. The single shifting distance of the sprocket assembly information corresponds to an axial spacing between adjacent sprockets of the at least one sprocket assembly.

Abstract: A bicycle sprocket comprises a sprocket body, a plurality of sprocket teeth, and a torque transmitting profile. The sprocket body has an outer periphery and an inner periphery positioned radially inwardly from the outer periphery with respect to a rotational center axis of the bicycle sprocket. The plurality of sprocket teeth is disposed on the outer periphery of the sprocket body. The torque transmitting profile is positioned around the inner periphery of the sprocket body. The torque transmitting profile includes at least ten internal spline teeth. The at least ten internal spline-teeth include at least one first internal spline-tooth, at least one second internal spline-tooth and at least one third internal spline-tooth. The at least one internal first spline-tooth, the at least one second internal spline-tooth and the at least one third internal spline-tooth are different in shape from each other.

Abstract: A bicycle sprocket arrangement comprises a smaller sprocket and a larger sprocket. The larger sprocket has at least one upshifting facilitation area configured to facilitate an upshifting operation in which a bicycle chain is shifted from the larger sprocket toward the smaller sprocket. The at least one upshifting facilitation area includes an upstream tooth, an intermediate tooth, and a downstream tooth. The upstream tooth has a first recessed portion. The intermediate tooth has a second recessed portion. The downstream tooth has at least one of a third recessed portion and a chamfered portion. The at least one of the third recessed portion and the chamfered portion are separated from the second recessed portion.

Abstract: An object is to prevent a loss in sprocket drive efficiency and chain slacking. The chain includes a plurality of inner link plates, a plurality of outer link plates, and a plurality of pins. At least any of the plurality of inner link plates, outer link plates, or pins include a hardened surface layer on part or all of sliding surfaces that slide against other components, the hardened surface layer containing one of Cr carbide, Ti carbide, V carbide, Nb carbide, Cr nitride, Ti nitride, V nitride, and Nb nitride.

Abstract: A bicycle sprocket arrangement comprises a smaller sprocket and a larger sprocket. The larger sprocket has at least one upshifting facilitation area configured to facilitate an upshifting operation in which a bicycle chain is shifted from the larger sprocket toward the smaller sprocket. The at least one upshifting facilitation area includes an upstream tooth, an intermediate tooth, and a downstream tooth. The upstream tooth has a first recessed portion. The intermediate tooth has a second recessed portion. The downstream tooth has at least one of a third recessed portion and a chamfered portion. The at least one of the third recessed portion and the chamfered portion are separated from the second recessed portion.

Abstract: A rear derailleur includes a base member, a movable member, a linkage and an electric motor unit. The base member includes a bicycle mounting portion for attaching to a bicycle. The movable member includes a chain guide having a first pulley that rotates around a first pulley axis in a center pulley plane that bisects the first pulley. The linkage movably supports the movable member relative to the base member. The electric motor unit is stationary with respect to at least a part of the base member and operatively coupled to the linkage to move the movable member relative to the base member between an outermost lateral position and an innermost lateral position. The electric motor unit is at least partially disposed inward of the center pulley plane while the movable member is disposed in the outermost lateral position.

Abstract: A rear derailleur includes a base member, a movable member, a linkage and an electric motor unit. The base member includes a bicycle mounting portion for attaching to a bicycle. The movable member includes a chain guide having a first pulley that rotates around a first pulley axis in a center pulley plane that bisects the first pulley. The linkage movably supports the movable member relative to the base member. The electric motor unit is stationary with respect to at least a part of the base member and operatively coupled to the linkage to move the movable member relative to the base member between an outermost lateral position and an innermost lateral position. The electric motor unit is at least partially disposed inward of the center pulley plane while the movable member is disposed in the outermost lateral position.