Joined: Mar 2014
Posts: 18,248
Likes: 6,624
From: ,location, location
Bikes: Foundry Chilkoot Ti W/Ultegra Di2, Salsa Timberjack Ti, Cinelli Mash Work RandoCross Fun Time Machine, 1x9 XT Parts Hybrid, Co-Motion Cascadia, Specialized Langster, Phil Wood Apple VeloXS Frame (w/DA 7400), R+M Supercharger2 Rohloff, Habanero Ti 26
I love my Thomson Elite posts (and stems) I have a bunch of them and they are all fantastic and at least all the aluminum ones are made in the U.S. Easy enough to adjust and stay put even under a heavy rider and some rougher riding sometimes.
A set back post is designed to help get you saddle back further if that is something you needed or wanted. Your saddle rails should be within the limits set on the saddle if they are not then a set back post can help achieve that.