Removing stuck or seized seatpost?

I don't doubt it can work it's all about 'how' stuck it is, in my case, which might not be typical I had to dril the post and use a lot of leverage.

Think I might have been reasonably lucky up until now. Bit wary of the caustic-soda option, might try the plumber's pipe-freezer spray on the next one - 531 Dawes collecting this weekend with a what looks like a nicely fluted post, which I'd like to try and keep, but sounds like might come furnished with this special option.

I wish I'd tried the freezing spray and the boiling water on the seat tube.
Good luck @richardshill

Have to agree, my pink frame I got the post out with soda but then residue in the frame killed a gxp bottom bracket at a later date as rain/damp must have got in and old soda pooled in the bottom bracket.

More news on Sunday...

I did see him in another thread but 70 notes and postage on top for a bike I paid less than half for, seems a bit excessive.

The price you paid for the bicycle is immaterial. It was badly listed and you got it cheap. If you have to, imagine you paid £60 for the bicycle and this repair is going to cost you £40. That feels better doesn't it :-)

That's certainly true to a point, however I basically don't have a lot of spare cash, so any money I spend getting out a stuck seatpost is money that doesn't get spent on the family and I'll have a hard time justifying it to the missus. Also, I bought this bike to put a child seat on, and the £70 (plus probably £30 on postage) is money I could use to buy a nice kiddie seat with.

It's also worth mentioning, that despite claims to the contrary there are a few dings in the frame. Nothing structurally bad, but it's lived a bit. If it were mint bar the stuck speatpost I might consider it, as it's quite a nice bike, but as it's basically only a step or two above beater level I'll see how far I get with this on my own and then call it.

Fair enough. By the way what kiddie seat are you looking for? I'll keep an eye out. I found this really cool one for @vello but he was looking for something more French and chic.

(Yes I know, kiddieseatthreadthatway)

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I've had one out this way (a properly stuck one), soaked it in Diesel for a few days and put it in a bench vice, the seatpost didn't survive but the frame was fine.

I'm also plagued by a waking seatpost nightmare. Tried quite a few methods which ended up mangling the top end of the post. I've tried the cutting down technique but without a real amount of patience so have ended up pulling bits out rather than full length leaving the post entirely inside the tube. Saying this though I'm doubtful I would have been able to get enough leverage as it's so far down. The real problem seems to be that it's carbon wrapped which seems to have acted like a glue. My current thinking is to go down the caustic soda route, hoping that once the post is gone I will be able to scrape the carbon wrap off the inside of the seat tube fairly easily.. but if anyone has experience with other techniques (which are significantly fewer now that the post is shallower than the seat tube) then I'm all ears!

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When you say soaked it in diesel, what the best way to 'soak' it per se? Presuming you don't have a vat of diesel to submerge the frame in. I've pumped a load of GT85 (all I had), through one of the bottle bosses and strapped rubber glove over the open end of the seapost.

@coppiThat that's actually the exact one I've been looking at, weeride something or other - brother in law recommended it. However, I'm not in London so need delivery.

@Theoazb Yeowch, that looks like a epic ballache. Can't think of any other way then the 'dissolve that bastard' method but I'm a newcomer to the 'letting a stuck seatpost consume your life' game.

okay , i'll check if its still there , it was only 10 or 15 pounds. keep your fingers crossed.

@theoazb how much is in the frame? Maybe hacksaw blade?

From this thread
https://yacf.co.uk/forum/index.php?topic=107323.25
a comment from Identicalbutlighter
takes you to this.
https://www.instagram.com/p/BZvQN1OlFLk/?taken-by=identicalbutlighter

Look further down his IG page and there's other examples of it's use

I've got an Alu seat post stuck in a steel frame.
Any recommendations for a shop in london with a high success rate?
I don't think I have the patience or tools to give all these methods a proper go, will likely end with a hammer thrown somewhere and damaging the frame.
need the bike out of action for the shortest amount of time possible so leaving it in one place until it is done will be the quickest I reckon.

Any recent experience with this guy? http://theseatpostman.com/service/

Mentioned upthread but not much about them/him.

Trying to unfreeze a stuck ti seatpost, I’d rather not destroy it if possible.

Long overdue update: The seatpost is out!

Heated it up with a heat gun then cooled it with GT85/water. Did this periodically over a long-ish period of time, then forgot about it for ages. Today I tried putting the seatpost in the vice and yanking the headtube end. Started to move fairly easily but applying a necessary force to move it out was a slow process. Got about half of it out, in the end a chap from work who's about 50 times stronger then me put a stilson wrench on it and got the last half out. Lots of corrosion and electrolysis on the post.

Have waxoyled the inside of the seat tube and will give it a good clean out at some point.

Here's the blighter. Basically the entire post was stuck in the frame.

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Winning!

siggggggggh. alloy post stuck in carbon frame. what's the most reliable method for dislodging those? taking to LBS?

Yep, it was pretty satisfying I have to admit.

Hi guys, 11 years later, but the wait is over. I am here to solve the bike mysteries for you. I have solved a lot of cases, even the very nasty ones - the whole length of seat post was stuck in the frame. No heating, no bending and no watching. Based in central London. Beer deposit.

so what's the solution? I've got a couple I need to free off

Where in Central?

No heating, no bending and no watching

you must be one of those ‘quantum mechanics’ I read about on the internet...