FlyKly is a $550, 30lb. rear bike wheel replacement that promises 20MPH/30 miles of electric range

[kickstarter url=http://www.kickstarter.com/projects/flykly/flykly-smart-wheel width=704]

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 app.

On the downside, you are also replacing your rear gear sprockets and shifting mechanism and it doesn’t seem like you can have too much control with a smartphone for changing speeds while biking.

Estimates look like the product will hit production late next year.