10-Speed bicycles

In a 10-speed bike having front and rear derailleur mechanisms, and a pair of movable cables connected at one of their ends to different ones of said mechanisms for controlling the same, the improvement of a single manual control for all 10 speeds of said bike, said improvement comprising a pair of 10-station cams mounted on a common shaft, a pair of cam follower mechanisms engaged with said cams and having the other ends of said cables connected thereto, and a single manual member for rotating said shaft to move said cams in unison, and an indicator for all 10 speeds of said bike.