Jeff Tiedeken, Aerospace Welder and Party Animal.

http://blog.gessato.com/2011/04/03/gravity-bike/

http://www.cycleexif.com/mls-gravity-bike

http://www.core77.com/blog/object_culture/jeff_tiedekens_gravity_bike_gets_up_to_60mph_18966.asp

MTB, MTB, MTB.