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 nothingā€”and weighs only six. Worth $45,000?

The thingā€”crafted by Tucson's Fairwheel Bikesā€”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. You might scoff at the spritely bikeā€”shouldn't racing equipment be tough?ā€”but Fairwheel Bikes has already glided across 20,000 miles of pavement with the prototype, ensuring its durability. [TriRig via DVICE]