Science Technology GreenWheel Wants to Make Going Electric Easy for Bikes By Jaymi Heimbuch Writer California Polytechnic State University, San Luis Obispo Jaymi Heimbuch is a writer and photographer specializing in wildlife conservation. She is the author of The Ethiopian Wolf: Hope at the Edge of Extinction. our editorial process Twitter Twitter Jaymi Heimbuch Updated October 11, 2018 Migrated Image Share Twitter Pinterest Email Science Space Natural Science Technology Agriculture Energy Photo via Discovery News, credit MIT Media Lab How great would it be if you could just swap out the wheels on your pedal-powered bike and - Voila! - it's an electric bike? Well, you might not have to wait too long for that to be a reality.MIT scientists are working on a bike wheel that would allow you to swap out your regular old boring bike wheels for an electricity-generating wheel. Called GreenWheel, the system is designed so that all the important components - power generation, storage and propulsion - are all encompassed within the wheel. And it can last as long as 8 years or 40,000 miles. From the outside, the GreenWheel has the radius of a small dinner plate and is about 2 inches thick. Inside the aluminum frame sits the three major GreenWheel components: an electric generator, batteries and an electric motor. Something so small, durable, and able to be retrofitted to existing bikes could mean an inexpensive option for people looking into electric bikes.