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  1. #1
    mtbr member
    Reputation: edbraunbeck's Avatar
    Join Date
    Apr 2007

    429 Seat Post Slipping

    My seat post on my 2011 429 is slipping. It's the Syntace carbon post with the stock clamp if that helps in diagnosing the problem. When it was originally assembled, I used the Taxc carbon lube/paste.

    It held it's position for the longest time but recently started sliding down after raising it slightly. Any recommendation for proper torque?

    My plan is to clean the seat post and reapply the Tacx to see if that works.


  2. #2
    mtbr member
    Reputation: wilbcol7's Avatar
    Join Date
    Oct 2011
    I've had the same problem with a 2011 5.7. I have bought 2 Thompson seat posts to try and fix the problem. I have used carbon prep on both. The second one will hold if I torque the stock fastener to 80 inch pounds which I would not recommend on a carbon post. When I called Pivot they suggested that even high end posts can have an uneven diameter and I should try another post to see if the problem continued. I am wondering if there was a problem with the 2011 seat post tubing or seat post collars that is causing the problem.

  3. #3
    mtbr member
    Join Date
    Dec 2009
    FSA and Woodman posts kept slipping in my 4. I ended up wrapping tape on the post above the collar to mark my height and keep it from slipping.

  4. #4
    mtbr member
    Reputation: ccornacc's Avatar
    Join Date
    Mar 2007
    I had a masterpiece that slipped with the stock clamp and I bought another clamb that worked. It was a turner clamp that would not bend as much. It has not slipped since.

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