M.I.T. reinvents the wheel for a hybrid bike

The Copenhagen wheels stores the kinetic energy created when the bike brakes or coasts downhill, just like a hybrid automobile. The motor kicks in when sensors detect that the riders needs some help up a hill or into a headwind. The hub interacts via Bluetooth with a iPhone mounted on the handlebars to shift gears, plus there's a GPS to track your ride. You can even see where other riders are or where traffic is building using the iPhone app.