I intended to also say that I really like the idea of direct drive, in the sense of pedals directly on an internal hub. But I don't think it can be done with current hubs and attain normal cycling speeds. Because of the required gearing being omitted. I gave up on it. Ken ________________________________ From: Vi Vuong <vi_vuong@xxxxxxxxx> To: Python <python@xxxxxxxxxxxxx> Sent: Wed, February 16, 2011 10:16:13 PM Subject: [python] Evolution Bike Hi All, What do you think about a direct drive python? I have a recycled 16in Razor Scream Machine that I may want to make a compact folding python, bike/trike that would fit in the trunk ~2x1.5x3ft http://www.google.com/images?um=1&hl=en&biw=1440&bih=791&tbs=isch:1&sa=1&q=%22razor+scream+machine%22&aq=f&aqi=&aql=f&oq= At first glance the Evolution bike looks like a python, but the pivot is high and trail is near zero, so probably no self-centering effect. http://www.trendhunter.com/trends/evolution-bike Vi