Abstract: A control assembly is disclosed for attachment to a bicycle to enable an ambulant cyclist to propel and steer his vehicle while walking or running alongside, or to the rear, thereof. A preferred embodiment of the assembly comprises two components which attach to the vehicle, the first secured to the front end to limit lateral movement of the front wheel, and the second secured to the rear end to permit foward and directional momentum imparted thereto to be transmitted to the vehicle. A second embodiment of the assembly employs only the second component attached to the bicycle handlebars. This embodiment of the invention permits control of both direction and movement of an otherwise unstable vehicle at a single location on the vehicle.