Weds Sports, a Japanese wheel-maker, has created a full carbon fiber wheel -- rims, spokes, hub, everything -- that weighs 2.76 kg. Coming out to about 6.1 pounds, that's about half the weight of ...

The most advanced bicycles today are deployed in track racing. The recently unveiled SB II, or Superbike II, has a lightweight carbon-fiber frame. It also has a range of aerodynamic design elements.