Originally Posted by
TigerMom
Thudbuster worked great for me to smoothing out the road/ruts. But the Thudbuster definitely bobbed whenever I pedaled hard uphill.
I will probably be looking for either the Body Float or Redshift's Stopshock seat post for a Christmas gift to myself.
The Cirrus Kinekt 2.1 (the new version of the Bodyfloat) uses two springs. One supports your body weight and the other spring (at a different angle) provides damping. The Redshift only uses one spring and has no damping. If you don't like bobbing while riding the Thudbuster, you'll be far happier on the Kinekt. The Kinekt with aluminum post is on sale for $200 while the pre-order price for the Redshift is $160. It's a small premium for a superior post that's widely used.