I recently purchased a Selle SMP Dynamic, but can't seem to get it to seat properly on my seat mast cap. I did some searching online and found other folks who've had the same problem, yet there are also pictures of Selle SMPs on Madones.

Does anyone have any suggestions? It appears it's possible somehow, but I can't seem to find it.

What problem in particular? Does the rail not fit the clamp? If that is the case you can go to your local TREK dealer and order a replacement clamp for your seat mast that can accept your rail size.

http://bontrager.com/model/06096

It isn't the rail size, I can't seem to get it to sit down far enough to get between the mounting clamps. The top of the cap appears too wide.