His maintenance-free bike uses a "secret" mix of organic materials to make it waterproof and fireproof, and is then lacquered to give it a friendlier appearance. It's expected to cost a mere $20 and weigh about 20 lbs (9 kg) -- that's 65 percent lighter than an average metal ride. In fact, this bicycle doesn't use any metal parts at all -- the solid tires are made of reconstituted rubber and a car timing belt is used instead of a chain. It lacks the swank of aFaraday Porteur, perhaps, but then you could buy 175 of these for the same money. More here.