It is hard not to like this idea: You replace your rear bike wheel with this special FlyKly wheel which houses a motor, a controller, and some batteries. You set the speed with a smartphone or Pebble ...

It was back in 2009 that we first heard about the Copenhagen Wheel, a motor-equipped rear bicycle wheel that could turn an existing bicycle into an e-bike. The years since saw some delays, but as of ...

It wasn't long ago that we tried out the FlyKly Smart Wheel, a motorized rear bicycle wheel that instantly turns a regular bike into an e-bike. Given that it goes in the back, however, it's a little ...