The Copenhagen Wheel

The Copenhagen Wheel–developed by MIT researchers–is a new bicycle wheel that not only makes your conventional bike electric but it can keep track of friends, smog and traffic all while talking to your iPhone.

The electric motor helps the un-cyclist traverse steep inclines and provides an extra burst of speed when needed. The wheel uses regenerative braking, such that every time a rider puts on the breaks, the wheel stores that energy. All of which is housed in the hub of the wheel, which can connect to any standard rim.