These are pretty pricey and I just came across these doing a google image search on 42mm rims by accident. These are too cool.I would like to have one of these motorized. Anyone here think they can fabricate these? It looks like it would be easy compared to the things I see people doing to bikes here.... Check these out ! They are called xtracycles. I like saddlebags so you can carry things with you.But this is ridiculous. In a good way !!!!!They call them Big Dummy's Xtracycle Gallery: February 2009 These need motors!