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Seized seat post on a 2007/8 Giant XTC mountain bike

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Seized seat post on a 2007/8 Giant XTC mountain bike

Old 08-10-11, 01:29 PM
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Angus530
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Seized seat post on a 2007/8 Giant XTC mountain bike

I have recently bought a secondhand Giant XTC mountain bike. The bike is in very good condition indeed. [2008] However, the the seat post is completely solid and will not move, this despite the attentions of a local bike shop. The frame is carbon fibre and I'm reluctant to become too violent with it.

The seat will have to move up approximately 3/4 inches to achieve the ideal riding position. I would be grateful for any advice on how to sort things out. I thought of cutting the existing seat post and inserting a carbon fibre tube onto this, clamping it top and bottom. Does this seem a valid solution?
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Old 08-10-11, 02:05 PM
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buffalangelo
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Not too sure but you could spray the seam with wd-40, let it sit for a bit then put a rag on the post and try to twirling it out with vice grips. Be sure the grips aren't too tight tho. However this is coming from a novice so I would first wait for more responses
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Old 08-10-11, 02:23 PM
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CACycling
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What is the seapost made of? It is hard to believe anything seized to CF. I'd be worried the former owner had problems with the seat post slipping and, instead of using carbon assembly paste, decided to use some form of adhesive. If the ID of the seat post is large enough and you can find a seat post to fit inside of it and use the existing seat post as a shim, that would be a possibility but you'd need to slit the remaining seat post inside the frame to allow it to clamp which, as it is surrounded by CF, is problematic as well.
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Old 08-11-11, 08:19 AM
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Cut it out, VERY carefully. Tedious job at best, do not rush it. You may have bought a donor bike (pick up a nice used frame, and swap out the parts).

Last edited by wrk101; 08-11-11 at 01:23 PM.
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Old 08-11-11, 09:48 AM
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Ridden hard and put away wet is hard on horses too..
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