I built this thing using a mangled schwinn fairlady some VW parts, some air compressor parts, exorsise bike parts. I modified the insides of a rear coaster brake to use as a drum on the front wheel. This is by far the most fun I have ever had riding a bike. It is just as fun to watch other people ride it. I am now building a few with all new parts, I can also sell just a triangle and seat stem for you to make you own. supplies are limited.
See how to ride it... http://www.youtube.com/watch?v=R5P70XtI4zQ
See how to ride it... http://www.youtube.com/watch?v=R5P70XtI4zQ