The Alfa [bicycle] weighs 20lbs, yet supports riders up to 24 times its weight. It’s mostly cardboard and 100% recycled materials, yet uses a belt-driven pedal system that makes it maintenance free. And, maybe best of all, it’s project designed to be manufactured at about $9 to $12 per unit (and just $5 for a kids version.
Got questions about your bike or bicycling in general? Surly bikes' Skip Bernet has answers to just about any bike forum post ever written.