Seat post stuck in frame

by jova54   February 18, 2010  

Help please.

Ive got a steel frame with an alloy seat post stuck in it.

I've tried brute force and spraying release oil in the small gap around the clamp but can't budge it. Sad

I don't have access to a metal working vice but have most other tools.

Anyone got any suggestions on getting it out.

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hmmmmmmmmmmmmmmmm.

there's no guarantee it'll come out at all if it's properly seized, sometimes the only way to remove the post is to melt it out Devil

first thing to try would be to wedge the seat somewhere it won't budge and use the leverage of the whole bike to try and twist the seatpost loose. if you can't twist it loose like that, then it isn't coming out without some heavy tools.

there's various other things you can try. One method is to saw the seatpost off an inch above the frame then use one of those plumber's hacksaw things (where there's no frame to get in the way) to saw through the seatpost inside the frame. If you can cut it into 2/3 pieces you can try and knock them away from the frame with a rubber mallet.

failing something like that it's a blowtorch and a respray...

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posted by Dave Atkinson [7034 posts]
18th February 2010 - 17:19

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Sheldon Brown has 15 ways to unstick a seatpost. Ammonia sounds promising.

A friend of mine who took a bike with a stuck seatpost into a bike shop in Cambridge was told by the owner that he wouldn't touch it, since he knew someone who had died attempting to remove a stuck seatpost!

two wheels good; four wheels bad

posted by cat1commuter [1301 posts]
18th February 2010 - 20:48

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There is or was a release spray oil caled plus gas,
it was the best thing for the job, if you can find some.

Get some plastersean and make it into a cup around the frame where it meets the seat post.
Spray some plus gas into the cup and let it soak in
over night.
Use brute force the next day.

It has worked for me Smile

posted by weaty [22 posts]
18th February 2010 - 21:05

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If you're trying heat, boiling water is a bit more benign than the ol' blowtorch. Pour it on the steel, not the aluminium, and twist quickly before it gets the chance to cool down. It's worked for me. Once.

posted by effemm [92 posts]
18th February 2010 - 21:56

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good call on the boiling water. a hairdryer is worth a pop too...

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posted by Dave Atkinson [7034 posts]
18th February 2010 - 23:15

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posted by Dave Atkinson [7034 posts]
18th February 2010 - 23:17

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Leonard Zinn of Velonews.com wrote an interesting article some years ago on this troublesome subject!

i also had the problem on the Tour de France one year and hacksawed the top off then hacksawed carefully the interior of the seat post! worked wonders with several racers practically crying with laughter at my efforts!
www.parrabuddy.blogspot.com should have a link in the blogs coming through.
Veloreview is asking that people encourage "disabled Cyclists to join their site so as to add to the content on "Physically Challenged Sport" , pass the word as you encourage tandems and Handbikes to join your weekend rides!

Skippy(advocate for "Disabled / Para Sport")@skippydetour. blogging as skippi-cyclist.blogspot & Parrabuddy.blogspot currently on the road with ProTour Grand Tour Events .

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posted by skippy [372 posts]
19th February 2010 - 19:40

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Cheers for the suggestions and comments everyone.

Without a metal working vice I'm leaning towards the hot water, then the plus gas and finally the hacksaw. I've also got an electric blow torch somewhere, might try that as well.

Watch this space.

Did Nightrider 2013 for Parkinson's UK, doing it again this year just for the fun of it and to raise more money.

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posted by jova54 [526 posts]
19th February 2010 - 20:32

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yeah keep us posted. pics too! Smile

careful the blowtorch doesn't blister the paint if you go after it!

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posted by Dave Atkinson [7034 posts]
19th February 2010 - 20:50

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