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@skydancer
A bike whose gear shifting is controlled by brainwaves has been developed by Toyota.
http://www.gizmag.com/pxp-aero-road-bike-thought-control/19107/
Seems a waste of time and money to me especially with the speed of shifting with current sti-shifters which can be done so instinctively. Also you must wear a helmet containing neuron transmitters for it to work.