An easy to operate control means for shifting gears on dual shift bicycles is described. The control means is constructed so that the front and rear derailleurs of a dual shift bicycle are controlled together to shift to any selected gear from any engaged gear with a single operator action. The design...http://www.google.com/patents/US4412828?utm_source=gb-gplus-sharePatent US4412828 - Control means for shifting gears on dual shift bicycles
