World’s Lightest Bike

A new road bike will probably cost you a grand or so. It'll also probably weight almost 30 pounds. But this featherweight specimen, made entirely out of carbon fiber, skimps on nothing—and weighs only six. Worth $45,000?

Crafted by Tucson's Fairwheel Bikes—really is a beautiful piece of engineering: titanium spokes, ten-speed rear gear, and a tough, gorgeous carbon frame you could haul around with one hand.