Spring-loaded hub smoothes out your pedal stroke

This looks really interesting, and jives with my own experience surging on climbs with each stroke.

The folks at [RoadBikeReview are skeptical](http://forums.roadbikereview.com/showthread.php?t=155208), as are [the commenters at Bicycle Design](http://bicycledesign.blogspot.com/2009/10/e-hub.html), but while I admit any energy storage system will lose some amount of power, the benefit of reducing acceleration and deceleration on climbs may be worth it.