ShareRoller: a portable electric motor for bicycles

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ShareRoller transforms a bicycle into an electric bike. And according to its creator, it works with major bicycle share programs in the US, UK and Canada.

New Yorker Jeff Guida, a former financial analyst, developed this project and says he has the financing to start production by this summer. His portable electric motor, quite small (8” x 11” x 2.7”) and light (less than 7 lbs.), provides 750 Watts of power, enough to propel a bike to a top speed of 18 mph. The range varies from 12 to 20 miles, depending on the size of the lithium battery, which recharges in less than 2 hours. It has even a built-in USB port to recharge your smart phone.

Screen Shot 2014-04-01 at 3.32.43 PMShareRoller uses friction drive to power the front wheel. It attaches to the bike through a patented bracket, and the firm says it takes less than 10 seconds to fix it on a share bike. Adapter mounts to fit most bicycles and even some kick scooter are being developed. The motor is controlled via a throttle that clips to the handle bar.

Prices start at $1,195, with the longer-range version at $1,495. Before you buy one though, checkout the legality of electric bicycles in your region. ShareRoller’s website mentions that “UK and Canada kits will be power restricted to comply with local regulations”. In the US the patchwork of regulations raises a lot of questions, and it is not even clear that a New York CitiBike with a ShareRoller is legal in the Big Apple…

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