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Old 07-20-14, 11:34 AM   #1
coolcamaro12
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A stuck seatpost that is not exactly seized?

The video says it all. I am having trouble removing this seatpost
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Old 07-20-14, 11:52 AM   #2
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I can't be sure from the video. Is the post itself moving or is the saddle clamp moving on the post?
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Old 07-20-14, 11:55 AM   #3
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you've loosened the clamp, but it's a three part affair. saddle. clamp, seatpost. if you completely remove those big nuts on either side of the clamp, you may be able to get the saddle off. then you will see that the seatpost is probably seized in the seat tube, or maybe not.

you probably have a seatpost clamp like this:



and a seatpost like this:



edit: good question about whether or not the clamp is loose on the post or not. it looked to me like the clamp was loose and the post was stuck, but maybe not...

that type of seatpost, IIRC has two different outside diameters, one for the saddle clamp and a larger one for the seattube. the seatpost may have been pushed down so far that the smaller diameter was below the clamping area of the seattube. then the seatpost clamp was clamped down making it impossible to get it out again. if so, a little prying on the clamp area of the seattube might yield results.
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Old 07-20-14, 11:58 AM   #4
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[QUOTE=hueyhoolihan;16956677]you've loosened the clamp, but it's a three part affair. saddle. clamp, seatpost. if you completely remove those big nuts on either side of the clamp, you may be able to get the saddle off. then you will see that the seatpost is probably seized in the seat tube, or maybe not.

you probably have a seatpost clamp like this:

The clamp on the frame itself? OPr are you referring to some bolts on the seat? It's just nuts that tighten and some steel from the frame clamps it on.
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Old 07-20-14, 11:58 AM   #5
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Originally Posted by FBinNY View Post
I can't be sure from the video. Is the post itself moving or is the saddle clamp moving on the post?
The post itself is moving.
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Old 07-20-14, 12:14 PM   #6
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i'll bet in an attempt at lowering the saddle to it's lowest limit, at some time, the seatpost's smaller diameter (the part where the saddle clamp goes) is now below the seattube clamping area. the seatpost clamp was then tightened at one time, successfully or not, and has trapped the seatpost there. try prying the seattube's clamp open a bit.

looking at the video it's easy to see the smaller saddle clamping diameter of the seatpost is all that is showing when the saddle is pulled up and down. that shouldn't happen. we should be seeing part of the seatpost's larger diameter too. it's a convincing sign to me that the larger portion is trapped below the seattube's clamp.

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Old 07-20-14, 12:22 PM   #7
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Quote:
Originally Posted by coolcamaro12 View Post
The post itself is moving.
OK. It seems to be totally free with a definite very positive stop. Look along the frame for anything that might extend into the sear tube, such as a waterbottle mounting screw, and remove it. If you don't see anything on the outside, remove the saddle and look down the post for a hint.

Otherwise, mount the saddle clamp tightly, and turn it so you can drive it up with a hammer. Don't pound, but see if it maybe moves past a tight zone, then comes free. Otherwise, if it's still totally free with a hard solid stop, you missed a stop pin of some kind.
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Old 07-20-14, 01:32 PM   #8
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I got it off About 2 coffees later and a ton of brute force I slowly managed to slide it off....It was REALLY stuck in there and the seat tube is quite tight so I am going to push it out a bit more.
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Old 07-21-14, 09:25 AM   #9
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If you are still struggling with that post, you might try blasting the post with a co2 fire extinguisher. This will chill the metal quite a bit and it will shrink providing some play.
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Old 07-21-14, 05:54 PM   #10
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If you are still struggling with that post, you might try blasting the post with a co2 fire extinguisher. This will chill the metal quite a bit and it will shrink providing some play.
That would have definitely make it easier, And I never thought of using a fire extinguisher. I was even thinking of using the 12 gram c02 cartridges you use for airsoft guns and tire inflators.
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Old 07-23-14, 09:44 AM   #11
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That is a trick I picked up from an old boatyard worker down in the Chesapeake. It worked well for me with aluminum.
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