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 ...

Removing and reinstalling a bike's rear wheel can be quite a laborious, frustrating process, as you have to wrangle the chain, derailleur and (if applicable) the disc brake. The new Fasten system, ...