The Copenhagen Wheel project can turn any bicycle on the market into an electric one.
The device may be simple in its design, but its capabilities are quite advanced. It consists of a piece that replaces the rear hub of the bicycle and attaches to the bike’s original chain. The cyclist simply begins pedaling in order to store electric energy within the red device.
Additionally, cyclists can control the bike’s speed and measure the distance they have traveled using their mobile phone.
The device will cost around 700 dollars.