hopperagent wrote:
Make sure you have the correct clamp. I've had the same problem. Great bike. But Trek made the seat clamp, seat post length and setback too complicated on this bike in my opinion.
Agree with this point re make sure you have the correct clamps. I had a saddle with alloy rails and had no problems, but they had to warranty the saddle (Bontrager Serrano) due to creaking in the shell and replaced it with one with carbon rails and new clamp ears for the oval carbon rails. The new ears didn't sit tight in the seat clamp and post or completely flush on the oval saddle rails when I installed the new saddle and it seemed a little "loose", but they were labeled as the correct part so I torqued to specs and hoped for the best. I had saddle tilt slippage issues (saddle would not slide for or aft, but I had tilt slippage). I went back to the Trek shop and they realized they gave me saddle ear clamps for the prior model Madone, and ordered me some for the 9 series (the older clamp ears were the only ones I could find on the Trek website, which probably contributed to how the wrong part was originally ordered). The new 9 series clamp ears now fit flush and tight within the seat clamp and post and I have no slippage at all (of note as well is the torque specs on the new ears are much lower than the older clamp ears).