Evelo is developing or has developed a powered front wheel, battery and controller for existing bikes.
See short article in Forbes which states top speed will be 20 km PH.
http://www.forbes.com/sites/bradaue...providing-90-of-the-end-product/#37a9dc831ec8
See short article in Forbes which states top speed will be 20 km PH.
http://www.forbes.com/sites/bradaue...providing-90-of-the-end-product/#37a9dc831ec8