When architect and engineer D.M. Schwartz watched an uphill section of the 2011 Tour de France, he says he noticed that the bobbing motion of the riders looked like wasted energy. If only the rider had something to push his back against, restraining vertical motion and allowing more leverage on the pedals.
Schwartz went to work, developing various frame designs that implemented a plate or bar to provide the needed rider force reaction. The proof-of-concept bike shown here was built in 2014 using the lower portion of a 1988 Schwinn and all-new steel tubing above. Rider suspension is accomplished with an upside down mountaineering harness. Although less than optimal for a bicycle, it gets the job done. Down the road he hopes to commission a custom jersey with the harness built in. Check out the two videos below to see the bike in riding and flying mode (think hang glider position).