Dynamic has been selling drive-shaft bicycles for a long time: http://www.dynamicbicycles.com/ http://www.dynamicbicycles.com/ This looks like it could be good

Dynamic has been selling drive-shaft bicycles for a long time: http://www.dynamicbicycles.com/ http://www.dynamicbicycles.com/ This looks like it could be good to ride for fun, not so much for everyday transportation. I'd be worried about the stability of such a short bicycle, and the speed of such small wheels and wide tires.