Abstract: A bicycle chain comprises a first outer link plate, a second outer link plate, and an axial protuberance protruding. The first outer link plate comprises a first end portion, a second end portion, and a first intermediate portion. The second outer link plate comprises a third end portion, a fourth end portion, and a second intermediate portion. The axial protuberance protrudes from a first inner surface of the first intermediate portion in an axial direction. The second intermediate portion of the second outer link plate is free from an axial protuberance protruding from a second inner surface of the second intermediate portion in an axial direction.

Abstract: A bicycle sprocket comprises a sprocket body and a plurality of sprocket teeth provided on an outer periphery of the sprocket body and including at least one first tooth and at least one second tooth. The at least one first tooth has a driving surface side and a non-driving surface side. The at least one first tooth has a bevel cut shape in the non-driving surface side. The bevel cut shape is configured to avoid initially engaging with a bicycle chain in a shifting operation where the bicycle chain shifts from an adjacent smaller bicycle sprocket to the bicycle sprocket. The at least one second tooth is configured to initially engage with the bicycle chain in the shifting operation. The at least one second tooth is disposed adjacent to the at least one first tooth in a circumferential direction with respect to a rotational center axis of the bicycle sprocket.

Abstract: A bicycle rear sprocket comprises a sprocket body, a plurality of sprocket teeth, a shifting facilitation recess, and an upshifting facilitation projection. The plurality of sprocket teeth extends radially outwardly from the sprocket body. The shifting facilitation recess is to facilitate a shifting operation in which a bicycle chain is shifted between the bicycle rear sprocket and a smaller rear sprocket adjacent to the bicycle rear sprocket without another sprocket between the bicycle rear sprocket and the smaller rear sprocket. The upshifting facilitation projection is provided in the shifting facilitation recess to support the bicycle chain in an upshifting operation in which the bicycle chain is shifted from the bicycle rear sprocket to the smaller rear sprocket.

Abstract: A bicycle sprocket assembly is basically provided that includes a sprocket support member, a first sprocket, a second sprocket that is a separate member from the first sprocket, and a third sprocket that is a separate member from the first and second sprockets. The sprocket support member is configured to support at least one of the first, second and third sprockets. The sprocket support member includes a plurality of sprocket support portions extending radially outwardly from a central cylindrical portion. A first reinforcement member is attached to at least one of the first and second sprockets, and extends between the first and second sprockets. A second reinforcement member is attached to at least one of the second and third sprockets, and extends between the second and third sprockets. Each of the first and second reinforcement members is disposed between an adjacent pair of the plurality of sprocket support portions.

Abstract: A bicycle chain comprises an inner link plate. The inner link plate comprises a first inner-link end portion, a second inner-link end portion, an inner-link intermediate portion, at least one first inner-link chamfered portion, and at least one second inner-link chamfered portion. The at least one first inner-link chamfered portion is provided at least on an inner-link outer peripheral edge in a first inner-link surface. The at least one second inner-link chamfered portion is provided at least on the inner-link outer peripheral edge in a second inner-link surface. The at least one first inner-link chamfered portion has a first non-overlapped portion with respect to the at least one second inner-link chamfered portion when viewed from an axial direction. The at least one second inner-link chamfered portion has a second non-overlapped portion with respect to the at least one first inner-link chamfered portion when viewed from the axial direction.

Abstract: An outer link plate for a bicycle chain includes a first outer-link end portion, a second outer-link end portion and an outer-link intermediate portion interconnecting the first outer-link end portion and the second outer-link end portion. The first outer-link end portion includes a first outer-link opening having a first outer-link center axis. The second outer-link end portion includes a second outer-link opening having a second outer-link center axis parallel to the first outer-link center axis. The outer link plate has an outer-link longitudinal centerline. The outer-link intermediate portion has an outer-link outer surface and an outer-link inner surface that is opposite to the outer-link outer surface in an axial direction parallel to the first outer-link center axis. The outer-link intermediate portion includes an axial protrusion protruding from the outer-link inner surface in the axial direction. The axial protrusion is offset from the outer-link longitudinal centerline.

Abstract: A link plate for a bicycle chain is basically provided with a first link end portion, a second link end portion and a link intermediate portion interconnecting the first link end portion and the second link end portion. The first link end portion includes a first link opening having a first link center axis. The second link end portion includes a second link opening having a second link center axis parallel to the first link center axis. The link plate has a link longitudinal centerline defining a longitudinal direction. The first link end portion has a first extended edge portion extending away from the second link end portion in the longitudinal direction or the link intermediate portion has an axial protrusion protruding from an inner surface thereof in the axial direction.

Abstract: A bicycle rear sprocket assembly has a rotational center axis. The bicycle rear sprocket assembly comprises a first sprocket and a second sprocket. The first sprocket includes a first sprocket body and a first chain-engagement structure. The first sprocket body is made of a non-metallic material. The first chain-engagement structure is made of a metallic material and is configured to engage with a bicycle chain. The second sprocket includes a second sprocket body and a second chain-engagement structure. The second sprocket body is made of a non-metallic material and attached to the first sprocket body. The second chain-engagement structure is made of a metallic material and is configured to engage with the bicycle chain.

Abstract: A bicycle sprocket comprises a sprocket body, a plurality of sprocket teeth, and at least one chain-curvature limiting protuberance. The sprocket body is configured to be rotatable about a rotational center axis. The plurality of sprocket teeth extend radially outward from an outer periphery of the sprocket body. The at least one chain-curvature limiting protuberance is configured to limit axial curvature of a bicycle chain engaging with an independent neighboring bicycle sprocket which is adjacent to the bicycle sprocket without another sprocket between the bicycle sprocket and the independent neighboring bicycle sprocket. The axial curvature is curvature of the bicycle chain relative to the bicycle sprocket when viewed from a radial direction perpendicular to the rotational center axis. The at least one chain-curvature limiting protuberance is disposed on at least one of an outward facing side and an inward facing side.

Abstract: A bicycle sprocket includes a sprocket body and a chain engagement structure. The sprocket body has a center rotational axis, a first side surface and a second side surface. The first and second side surfaces face oppositely with respect to an axial direction of the bicycle sprocket. The first side surface is a smaller sprocket facing side of the bicycle sprocket. The chain engagement structure includes a plurality of sprocket teeth extending radially outward from an outer periphery of the sprocket body. The sprocket teeth include at least one shift assist tooth having a recessed portion recessed from the first side surface toward the second side surface. A protuberance is formed in the recessed portion.

Abstract: A link plate for a bicycle chain is basically provided with a first link end portion, a second link end portion and a link intermediate portion interconnecting the first link end portion and the second link end portion. The first link end portion includes a first link opening having a first link center axis. The second link end portion includes a second link opening having a second link center axis parallel to the first link center axis. The link plate has a link longitudinal centerline defining a longitudinal direction. The first link end portion has a first extended edge portion extending away from the second link end portion in the longitudinal direction or the link intermediate portion has an axial protrusion protruding from an inner surface thereof in the axial direction.

Abstract: A bicycle chain comprises an inner link plate. The inner link plate comprises a first inner-link end portion, a second inner-link end portion, an inner-link intermediate portion, at least one first inner-link chamfered portion, and at least one second inner-link chamfered portion. The at least one first inner-link chamfered portion is provided at least on an inner-link outer peripheral edge in a first inner-link surface. The at least one second inner-link chamfered portion is provided at least on the inner-link outer peripheral edge in a second inner-link surface. The at least one first inner-link chamfered portion has a first non-overlapped portion with respect to the at least one second inner-link chamfered portion when viewed from an axial direction. The at least one second inner-link chamfered portion has a second non-overlapped portion with respect to the at least one first inner-link chamfered portion when viewed from the axial direction.

Abstract: An inner link plate for a bicycle chain is provided. The inner link plate may have a longitudinal centerline defining a longitudinal direction and comprising a first inner-link end portion including a first inner-link opening having a first inner-link center axis, a second inner-link end portion including a second inner-link opening having a second inner-link center axis parallel to the first inner-link center axis, and an inner-link intermediate portion interconnecting the first inner-link end portion and the second inner-link end portion. The first inner-link end portion may have an extended edge portion extending to be away from the second inner-link end portion in the longitudinal direction.

Abstract: A bicycle chain comprises a first outer link plate, a second outer link plate, and an axial protuberance protruding. The first outer link plate comprises a first end portion, a second end portion, and a first intermediate portion. The second outer link plate comprises a third end portion, a fourth end portion, and a second intermediate portion. The axial protuberance protrudes from a first inner surface of the first intermediate portion in an axial direction. The second intermediate portion of the second outer link plate is free from an axial protuberance protruding from a second inner surface of the second intermediate portion in an axial direction.

Abstract: A bicycle sprocket comprises a sprocket body, a plurality of sprocket teeth, and at least one chain-curvature limiting protuberance. The sprocket body is configured to be rotatable about a rotational center axis. The plurality of sprocket teeth extend radially outward from an outer periphery of the sprocket body. The at least one chain-curvature limiting protuberance is configured to limit axial curvature of a bicycle chain engaging with an independent neighboring bicycle sprocket which is adjacent to the bicycle sprocket without another sprocket between the bicycle sprocket and the independent neighboring bicycle sprocket. The axial curvature is curvature of the bicycle chain relative to the bicycle sprocket when viewed from a radial direction perpendicular to the rotational center axis. The at least one chain-curvature limiting protuberance is disposed on at least one of an outward facing side and an inward facing side.

Abstract: A bicycle chain connecting link comprises a link pin and a link plate. The link pin has a center axis. The link plate comprises an elongated opening, a guiding portion, a first protrusion, and a second protrusion. The elongated opening comprises an insertion opening and an attachment opening connected with the insertion opening. The guiding portion is configured to engage with the groove of the link pin to guide the link pin between the insertion opening and the attachment opening. The first protrusion is provided between the insertion opening and the attachment opening and is configured to be slidable relative to an outer periphery of a head portion of the link pin. The second protrusion is provided between the insertion opening and the attachment opening and is configured to be slidable relative to an outer periphery of an intermediate portion of the link pin.

Abstract: A bicycle rear sprocket assembly has a rotational center axis. The bicycle rear sprocket assembly comprises a first sprocket and a second sprocket. The first sprocket includes a first sprocket body and a first chain-engagement structure. The first sprocket body is made of a non-metallic material. The first chain-engagement structure is made of a metallic material and is configured to engage with a bicycle chain. The second sprocket includes a second sprocket body and a second chain-engagement structure. The second sprocket body is made of a non-metallic material and attached to the first sprocket body. The second chain-engagement structure is made of a metallic material and is configured to engage with the bicycle chain.

Abstract: A bicycle sprocket assembly comprises a first sprocket, a second sprocket, a first intervening member, and a second intervening member. The first sprocket includes a first sprocket body and a first chain-engagement structure. The second sprocket includes a second sprocket body and a second chain-engagement structure. The first intervening member is positioned between the first sprocket and the second sprocket in an axial direction parallel to a rotational center axis. The second intervening member is positioned between the first sprocket and the second sprocket in the axial direction. The second intervening member is provided radially outwardly from the first intervening member with respect to the rotational center axis. The second intervening member is attached to at least one of the first sprocket and the second sprocket and has an elongated shape extending along a first reference plane perpendicular to the rotational center axis.

Abstract: A bicycle sprocket assembly comprises a first sprocket, a second sprocket, a first intervening member, and a second intervening member. The first sprocket includes a first sprocket body and a first chain-engagement structure. The second sprocket includes a second sprocket body and a second chain-engagement structure. The first intervening member is positioned between the first sprocket and the second sprocket in an axial direction parallel to a rotational center axis. The second intervening member is positioned between the first sprocket and the second sprocket in the axial direction. The second intervening member is provided radially outwardly from the first intervening member with respect to the rotational center axis. The second intervening member is attached to at least one of the first sprocket and the second sprocket and has an elongated shape extending along a first reference plane perpendicular to the rotational center axis.

Abstract: A bicycle sprocket includes a sprocket body and a chain engagement structure. The sprocket body has a center rotational axis, a first side surface and a second side surface. The first and second side surfaces face oppositely with respect to an axial direction of the bicycle sprocket. The first side surface is a smaller sprocket facing side of the bicycle sprocket. The chain engagement structure includes a plurality of sprocket teeth extending radially outward from an outer periphery of the sprocket body. The sprocket teeth include at least one shift assist tooth having a recessed portion recessed from the first side surface toward the second side surface. A protuberance is formed in the recessed portion.