Abstract: Bicycle frame support member for holding the axle of a rear wheel provided with a plurality of sprocket wheels, of the type comprising at least an upper end adapted to be connected to the frame of the bicycle, a lower end to which is fixed the body of a derailer, and an elongated notch adapted to receive the axle of the wheel, the support member further comprising a lug pierced with an orifice, disposed on the upper part of the support and projecting towards the outside with respect to the plane of the support and intended to guide the derailer-actuating cable which passes through the orifice pierced in said lug.

Abstract: A bicycle derailleur gear change provides improvements to existing systems which utilize a pivoted yoke carrying the pivots of a chain guide roller and a chain tension roller and a displacement device which includes two parts one of which is fixed to the bicycle frame and the other supports the guiding device and moves relative to the first to move the guiding device transverse to the bicycle wheel and across the gear change sprockets. In the present device the guiding device has a guide lug which pivots relative to the yoke in a plane perpendicular to the axis of the sprockets and common with that of the cheek of the yoke. A mechanical linkage is connected to the displacement device and pivots the lug when the guiding device moves transversely so as to bring the free end of the lug adjacent the selected sprocket corresponding to the position of the guiding device.