Okay, thanks much, I have read a few articles about the post and I was interested in how the post performed for owners. I know several other makers have had absorptive posts in the past, my wife has one on her Trek 7300. As good as the Zertz system works for the frame and fork I was thinking that a system like this for a post would work well, I vaguely remember some thread a few years ago about a "Roubaix" seat post but I cannot find it, now the cobl-goblr seems to have used this . My carbon post makes a good deal of difference for my CAAD 10.

Bill