Copenhagen Hybrid Bike Wheel
Developed by a group of MIT students at the SENSEable City Lab, the Copenhagen bike wheel is a device that attaches onto any standard bike wheel to supplements your ride. It assists you, it is like having a friend behind you on a bicycle for two. It will help you surpass obstacles such as hills or distances in order to live greener than ever. Its 250 watt motor converts friction (braking) into electricity and recovers energy when you are going downhill. Finally, everything is controlled through your iPhone, allowing you to boosts your ride from 100% to 300%.