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  1. #1
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    Glue for carbon ???

    Seatpost carbon slippage problem, NEED HELP!

    Carbon frame on Carbon post, I tried to clean it up nice with an anti-greaser and then lathered some anti-slip goo on it that I bought special for this reason, BUT ITS STILL SLIPPING!

    AM I TOO FAT? Cant fix that without riding the bike more!

    So I'm resigned just to epoxy it together and forget about it. I'm very happy with my easily replaceable generic Shimano pedals and Sella Italia seat, and know exactly what height the seat post should be, I'm looking to WELD THIS PUPPY IN PLACE.

    What do I use? How do I do it?

    Also, screw BMC for not responding to my cries for help!

    Thank you.

  2. #2
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    Stainless Steel Clamp. Done!
    BANNED

  3. #3
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  4. #4
    Darling of The Lounge
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    Before you go "completely nuclear" and epoxy your post in place, stop by the store and go to the section where they keep the travel-sized toiletries. Pick up a small spray can of ladies hairspray. After cleaning the outside of your carbon seat post and inside of your seat tube with alcohol, let it dry and spray a good amount on to seat post and insert it. Tighten the clamp down and let it sit a few hours.

    This worked for me on both my carbon frames. In fact, I had to remove the seat post to put one of my bikes in a storage case. I needed to enlist the help of my wife for a game of tug-o-war. She held the frame, while I had to muscle the seat post out.

  5. #5
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    Quote Originally Posted by retro grouch View Post
    i needed to enlist the help of my wife for a game of tug-o-war. I held the frame, while she had to muscle the seat post out.
    fify...

  6. #6
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    +1 +1 +1

  7. #7
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    Are you sure you have the right diameter seat post? You should not have to come close to using epoxy. If carbon compound and maybe turning the seat clamp 180 degrees and torqued to specs doesn't hold it in place I think something else is happening.

  8. #8
    .je
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    Drill a hole through the seat tube and post, pin it with a bolt and nut.

    Quote Originally Posted by Akirasho View Post
    Well you can do that too. I've used this and it works very well.

    The hairspray idea has worked for me too I'd suggest that first.
    Last edited by .je; 1 Week Ago at 12:43 PM.

  9. #9
    'brifter' is a lame word.
    Reputation: cxwrench's Avatar
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    If it's a BMC the chances of the frame having a round post are very slim.
    I work for some bike racers
    I've got some bikes, some guns,
    and a bunch of skateboards

  10. #10
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    Quote Originally Posted by cxwrench View Post
    If it's a BMC the chances of the frame having a round post are very slim.
    True. Probably no conventional clamp either but, until the op clues us in

  11. #11
    pmf
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    Gluing it in seems really drastic and irreversible. Try roughing the finish of the seat post up. I had the same problem with a carbon Colnago and it worked for me. This was over a decade ago, I'm still riding the bike, and no, the post never assploded on me.

  12. #12
    gazing from the shadows
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    Quote Originally Posted by duriel View Post
    Stainless Steel Clamp. Done!
    To expand: a stainless steel hose clamp, on the post so that it is right above the clamp collar. Can't slide down that way. It can still twist though.

    Put a bit of tape around the post to protect it first. Tape MIGHT be enough to keep from sliding without the clamp, but probably it would just slow it down.
    .
    Stout beers under trees, please.

  13. #13
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    Quote Originally Posted by QuiQuaeQuod View Post
    It can still twist though.
    CX sayes it isn't round, so I'm still in the mix!
    BANNED

  14. #14
    Pooped a refrigerator.
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    If you have a large enough gap, see if you can slide in a thin piece of rubber gasket.
    Ghurarmu shirkush’ agh azgushu. Zant ya apakurizak. Gűl-n’ anakhizak.

  15. #15
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    One guy has come close with some park tool compound, which looks very similar to the crap I've already tried.

    So I'll just buy some epoxy at Home Depot and see how it goes.

  16. #16
    gazing from the shadows
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    Quote Originally Posted by fatnsassy View Post
    One guy has come close with some park tool compound, which looks very similar to the crap I've already tried.

    So I'll just buy some epoxy at Home Depot and see how it goes.
    Do what you want, but trying epoxy before a hose clamp seems ill advised.

    As a general rule, you should try things that are easy to remove FIRST, and go with the epoxy as a last resort. What if your seatpost cracks or breaks down the line? Have you thought of how you would replace one that had been glued in?
    .
    Stout beers under trees, please.

  17. #17
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    Quote Originally Posted by fatnsassy View Post
    One guy has come close with some park tool compound, which looks very similar to the crap I've already tried.

    So I'll just buy some epoxy at Home Depot and see how it goes.

    You might still wanna play the "fat" card before you remove what could be considered a critical option (while most of us prolly keep the same height for years, age or injury might call for a change plus it could be a deal breaker if U ever wanted to sell the frame).

    PONR

  18. #18
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    If it is a round seatpost, you could always try a double bolt clamp.
    https://www.ebay.com/p/Java-FEROCE-F...5862888&chn=ps

  19. #19
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    Along the lines of Retro Grouch's, I once used Scotch77 spray adhesive on a problem carbon/carbon clamp area. It was removable, but only after applying a heat gun and lots of elbow grease.

    If there's enough room, you could also put a piece of self-stick 600-grit sandpaper on the post,, then clamp it down. Lots of options to try before the epoxy solution.

  20. #20
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    Measure the insertion depth and put a piece of tape around the seatpost as a reference point. Mix up a batch of JB Weld and apply a very thin coat with a chip brush below the tape to increase the diameter. Let cure completely and sand/add additional coats as needed to get a better fit.

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