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  1. #1
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    My Reverb won't stop slipping and I've tried EVERYTHING

    I've got a Reverb and TransAM 29er frame. I've been struggling with a slipping seat post since I got it and have tried the following:

    -grease
    -less grease
    -even less grease
    -fiber grip/carbon paste
    -less fiber grip/carbon paste
    -tightening the collar as much as possible without inhibiting the seat post mechanism.
    -roughing up the inside of the seat tube with sand paper
    -using an aluminum foil shim
    -using a metal washer shim in the collar bolt

    I bought bolt on collar to replace the QR collar and I'm going to try that today - but that's my last hope.

    Yes I've Googled "slipping seat post" and have tried all the suggestions. Anything short of welding the the seat post in place I'm willing to try at this point.

    Who's got the magic solution for this? Its driving me nuts.

    Oh and no, I'm not fat and yes, it's the right size seat post.

    Thanks in advance.
    2013 Transition TransAM 29er
    2012 Banshee Spitfire V1.5
    2011 Yeti 303R DH
    2005 Trek Bruiser SS

  2. #2
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    Did the bolt on collar fix the issue? I've always had terrible luck with QR collars as they're way too dependent on several friction points in order to work effectively. Bolt on clamps are recommended for dropper posts and carbon posts anyways as you can be much more precise with the amount of torque the bolt sees and ultimately the clamping force on the post.

  3. #3
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    you're probably a fat ass with the wrong size post...


  4. #4
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    Was the original seat post OK?
    Try giving the seat clamp a half turn so the clamp bolt is not on the same side as the seat tube cutout. I've seen that instruction for some carbon seat tubes.
    Maybe the Reverb diameter is out of spec. Measure it and the old post with a pair of calipers. Could be a warranty issue.
    Seat Post Trauma

  5. #5
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    I think your "last hope" may just do the trick, and it may have been the first thing I would have tried. I don't know what QR you had but a lot of the external clamp ones don't put much clamp force on the collar even though you're torquing the heck out of the skewer.

    The part I'm not sure of is this-



    Quote Originally Posted by VTSession View Post
    -tightening the collar as much as possible without inhibiting the seat post mechanism.

    You should be able to go to proper torque and hold the post without inhibiting the mechanism.

  6. #6
    usually cranky
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    buisness card. i guarantee it will work.

  7. #7
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    Greasing the threads on the collar bolt solved it for me -- someone else here on MTBR recommended it.

  8. #8
    Big Mac
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    My Reverb won't stop slipping and I've tried EVERYTHING

    Those things don't work on 29ers. Silly boy, everybody knows that.

  9. #9
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    Quote Originally Posted by .WestCoastHucker. View Post
    you're probably a fat ass with the wrong size post...

    Your own experience huh?

  10. #10
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    hey, i have the right size post up, oops i mean for, my fat ass thank you very much...


  11. #11
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    Well I fiddled with the new collar a bit along with putting a bit of friction paste on the inside of the seat tube. At first it slipped a little after about a half hour of riding. Then I greased the collar bolt and re-tightened it held for rest of my 10 miles ride. Looks like the collar fixed it! It may be a small victory but this has been driving me nuts since March.

    I also theorized that it was slipping because my frame has a anti-rust coating on the inside of the frame. I figured that wasn't agreeing the Reverb.

    Thanks for the tips guys. I was about to try the business card trick, that sounds promising.
    2013 Transition TransAM 29er
    2012 Banshee Spitfire V1.5
    2011 Yeti 303R DH
    2005 Trek Bruiser SS

  12. #12
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    Quote Originally Posted by maynsx View Post
    Try giving the seat clamp a half turn so the clamp bolt is not on the same side as the seat tube cutout.
    This as well. If you have the slot on the frame opposite the slot on the clamp you have much more even clamping pressure around the post. It's essential for carbon posts but also a good recommendation for other seatposts.

  13. #13
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    Dirt on grease. Worked for me.

  14. #14
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    you can also use a metal shim from a coke or beer can. I've seen that work before. Sometimes tolerance stacking can be a beast to deal with.

  15. #15
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    Quote Originally Posted by GTscoob View Post
    This as well. If you have the slot on the frame opposite the slot on the clamp you have much more even clamping pressure around the post. It's essential for carbon posts but also a good recommendation for other seatposts.
    That is a good idea.
    2013 Transition TransAM 29er
    2012 Banshee Spitfire V1.5
    2011 Yeti 303R DH
    2005 Trek Bruiser SS

  16. #16
    Tree Crasher
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    Hair spray works for me.
    CRAP... I'm in the wrong gear

  17. #17
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    I am surprised nobody has come up with some kludge fix like putting headset or BB spacers on the post between the clamp, and the collar on the Reverb.

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