[1] Explanation of the research in question behind this article, as well as a demonstration of the bike they based the research on. They very clearly describe

[1] Explanation of the research in question behind this article, as well as a demonstration of the bike they based the research on. They very clearly describe (at the end of the video) that even with gyroscopic and tracking forces removed, the two most important factors are where the center of gravity is, and the tendency to turn into a fall (arguably just the second, but it is caused by the location of the center of gravity with regards to the pivot). [1] http://www.youtube.com/watch?v=YdtE3aIUhbU http://www.youtube.com/watch?v=YdtE3aIUhbU Edit: more info on the TMS (two-mass skate) bike at its wikipedia page: http://en.wikipedia.org/wiki/Two-mass-skate_bicycle http://en.wikipedia.org/wiki/Two-mass-skate_bicycle