DIY Electric Bicycle Has Three Power Modes

A designer out of Ventura, California has released his home-built electric bicycle that features three power modes, so that a rider can choose a pedal-assist, pure electric motor, or standard biking when traveling. We first caught new of Roy Prince and his invention from the Gizmag blog, and immediately wanted to know more about the DIY project.

Prince has dubbed his vehicle the eCortina v2, as he built another model of the e-bike two years ago, and says he’s currently in the process of monitoring and testing full performance specifications. As far as looks go, the bike, seen in the photo below, is fairly sharp, and features two BMX style freewheels so that the electric motor can run without forcing the pedals to rotate.

eCortina v2, Electric Bicycles, Electric Vehicles, Roy Prince

image via Roy Prince

The eCortina v2 is powered by a 48 volt lithium polymer battery system, which theoretically gives the bike a range of approximately 15 miles, however, Prince is hoping to fit additional batteries to the electric vehicle this summer to boost the range to 23 miles.

Prince says his eCortina v2, which features a 3 speed rear-hub for gear optimization, and radio controlled, brushless magneto-electric motors, weighs roughly 60 pounds, but can reach an impressive top speed of 45 miles per hour. The eCortina v2 is for sale, however, there is only one and Prince isn’t listing the actual price, instead asking interested parties to contact him directly via his website.

Aaron Colter is a freelance writer and marketing consultant in Portland, Oregon. A graduate of Purdue University, he has worked for the NCAA, Dark Horse Comics, Willamette Week, AOL, The Huffington Post, Top Shelf Productions, DigitalTrends, theMIX agency, SuicideGirls, EarthTechling, d'Errico Studios and others. He is also the co-founder of, a free record label, recording studio, and distribution service for independent musicians.


  • Reply July 29, 2011

    Lee Bell

    and a 45 mile per hour bike is legal where?

    • Reply July 29, 2011


      I’ve hit 30+MPH plenty of times on my Bike and I was a fat 270lb man when I did it 😛

    • Reply July 29, 2011


      And where is it not legal? u00a0As long as your following the speed limit there’s no reason you couldn’t go faster. u00a0It’s not that hard to hit 40+mph without the help of a motor if you’re going down hill. u00a0I’ve hit 55mph under my own power….

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