Originally Posted by
NOS88
You really shouldn't have to bang it. With this particular type of seat post if you over-tighten it, it compresses the two barrels into the opening in such a way that they are indeed difficult to move. Not wanting to risk destroying the seat post, I'd encourage you to take it back to the Trek dealer and have them examine the post and show you how to adjust seat fore/aft and angle.
I have done that and the post has been replaced... no change. My LBS agrees with my assessment of the design! I don't know why Trek had to redesign it... except they probably saved a few grams of weight this way. I'll take the old way, thank you very much... and just sweat off the difference!
Fore and aft are no problem, it's the tilt that is the issue. I have it set slightly nose up on purpose, but would like to experiment some with different tilt just to see... if it weren't so difficult to adjust.
I may have to try CACycling's suggestion of using masking tape.