Bicycle sprocket, sprocket assembly, rear sprocket assembly, and drive train of bicycle

A bicycle sprocket comprising:

• at least one chain engaging member constituting at least a part of at least one sprocket tooth of the bicycle sprocket and being configured to contact a bicycle chain in a state where the bicycle chain engages with the bicycle sprocket, the at least one chain engaging member being made of a first material, the at least one chain engaging member has a first torque transmitting profile with a first surface on a circumferential end thereof, the first surface extending along a line inclined relative to a radial direction with respect to a rotational center axis of the bicycle sprocket when viewed in an axial direction with respect to the rotational center axis;
• at least one bicycle attachment member constituting at least a part of a sprocket body of the bicycle sprocket and being configured to be coupled to a bicycle, the at least one bicycle attachment member being made of a second material that is different from the first material, the at least one bicycle attachment member has a second torque transmitting profile to engage the first surface;
• and
• at least one shifting facilitation area provided in the at least one chain engaging member to facilitate a shifting operation of a bicycle chain.