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Help with stuck carbon seatpost(7 posts)

Help with stuck carbon seatpostJohnIV
Sep 4, 2002 7:07 AM
Somehow, my carbon seatpost has managed to get stuck in my aluminum frame. I've tried the spray lube and let it soak, and still doesn't work. Does anyone have any other suggestions? Has this happened to anyone else? I was told not to grease the carbon seatpost because it would slip, and the carbon wouldn't "freeze" to the aluminum. Thanks.
HmmmmGregory Taylor
Sep 4, 2002 7:33 AM
It shouldn't do that. Is it the right size? Have you completely removed the binder bolt?

As for getting it out, you might try heating up the seat tube with a hair dryer. See if you can get it to expand a bit and release the post.
Is it possible the post was too long?Dave Hickey
Sep 4, 2002 10:46 AM
Carbon shouldn't freeze in a aluminum tube. If the frame tubing has variable wall thickness, maybe the post is jammed at the bottom. If seen this happen with steel frames but I've never had it happen on aluminum.
Carbon will stick!!CT1 Guy
Sep 4, 2002 12:28 PM
If the post isn't lacquered, or it has worn off, then carbon will sieze in aluminum. Carbon as a semiconductor will have a cathodic reaction to the aluminium and cause corrosion. That's why original carbon frames split and fell apart. Looks like you may have to break the post to get it out and be careful with the aluminum not to tear it - you will also need to have the seat tube re-reamed as the corrosion will have built up inside the tube.
re: Help with stuck carbon seatpostJimP
Sep 4, 2002 1:19 PM
I had problems with the Easton CT-1 carbon post. The surface of the post was too soft and would deform. The binder bolt is a wedge-type, like Look and Aegis use, and the wedge would get stuck in a depression in the seatpost. I had to grab the seat and twist and pull while holding the bike down. Now I use a USE Alien post with a USE aluminum shim so the carbon won't be deformed.

re: Help with stuck carbon seatpostfbg111
Sep 4, 2002 2:53 PM
Wow, I didn't know this. I've been removing my carbon seat tube from my aluminum bike every night the past few weeks, but for other reasons.

It sounds like it may be a good idea to always remove the carbon post from an aluminum bike when you're done riding. Given this sticking problem, is there any reason not to?
re: Help with stuck carbon seatpostpaul3d
Sep 5, 2002 5:30 AM
I have the same problem with my USE1 post. If I pull and twist it will come out, but not easily. I went back to using grease. Yea the post slips in the begining but nothing a little tweak to the clamp bolt won't take care of. Next time I'm going with an aluminum post.