http://bit.ly/12YY0em - E-motion is an innovative roller for cycling that allows you to stay in balance while ou ride your bike. With E-motion you can also stand on your pedals and sprint, something all other rollers can't do. This unique feature is due to the internal part of the roller that floats back and forth to allow to riding safe and sprinting. Check the video to see you it works. E-motion is the winner of the Eurobike award.