Patent ID: 8137223

Claim:
A bicycle rear derailleur comprising: a base member including a first support portion and a first axle with the first support portion being pivotally mounted on the first axle; a movable member including a second support portion, a chain guide and a second axle with the chain guide being pivotally mounted on the second support portion by the second axle; a moving mechanism coupled between the first and second support portions; and an angular adjustment arrangement operatively coupled to at least one of the base member and the movable member, the angular adjustment arrangement being electrically operated such that the angular adjustment arrangement performs at least one of electrically pivoting the first support portion relative to the first axle and maintaining the first support portion in a pre-stored angular position based on a pre-stored operation amount of the angular adjustment arrangement, and electrically pivoting the chain guide relative to the second support portion and maintaining the chain guide in a pre-stored angular position based on a pre-stored operation amount of the angular adjustment arrangement when the moving mechanism is moved to move the second support portion of the movable member relative to the first support portion of the base member.