Wow! Light, durable, cheap (and with a belt drive):
Interesting idea, indeed…btw. here’s a video:
http://www.youtube.com/watch?v=txSboSNQINs
But…
…what about this cardboard bike, built by Phil Bridge of UK (in 2008)?
http://www.bbc.co.uk/manchester/content/articles/2008/06/13/160608_cardboard_bike_feature.shtml
http://www.youtube.com/watch?v=Bp57rskJNUo
Well… both for chain or belt system are very interesting to me, because this is a " cardboard" made bike. I think the chain system one, may not expensive, maybe it might be very cheap, but for belt system… hummm I think it may expensive than the chain one, not just about system, also it need to change or redesign the frame. 