Bicycle rear derailleur

The switching device has a tilter (1) supported on the bicycle frame (3) or on the wheel axle. The tilter has a cage (7) with guide and tensioning rollers to change the chain between chain plates. The cage is moved by an operation unit in the handlebar area, and is connected to the tilter by a cable (12,13) of at least one actuating link. The cage or a support element (6) of the cage is connected at a fixed part (2) of the tilter at the frame or wheel axle by at least two struts (4,5) of a parallelogram or similar component. Two lever arms (8,9) are connected to at least one strut, to fix the cables of the actuating link. The fixing points are radially spaced from the rotation points of at least one strut at the fixed part (2) of the tilter or at the cage or its support element.