Shout out to Christina Stidman! This is a new bike wheel known as the "GreenWheel", created by scientists at MIT. This will turn any pedal bicycle into an electric hog.

"Under its current configuration, a bike powered solely by a single GreenWheel (front, rear or both wheel can be equipped with a GreenWheel) has an estimated range of 25 miles. Pedaling the bike doubles the range under electric power, provided the rider isn't traveling at the nearly top speed of 30 miles an hour. The bike can be charged by pedaling or by plugging it into the electric grid.,, The GreenWheel is an offshoot of another MIT project the team members are part of, known as SmartCities. SmartCities hopes to expand the range and ease of public and private transportation. The GreenWheel is the latest addition to SmartCities line of vehicles, which also includes an electric scooter and a stackable electric car." (msnbc.com)