Dropper stuck in steel frame :( - Bike Forum

Re: Dropper stuck in steel frame :(

nealy — Tue, 20 Aug 2013 13:57:43 +0000

Use ammonia, google it

Re: Dropper stuck in steel frame :(

parkesie — Tue, 20 Aug 2013 13:55:46 +0000

Hope he didnt try my suggestion...

Re: Dropper stuck in steel frame :(

kayak23 — Tue, 20 Aug 2013 13:30:27 +0000

Any joy?

Re: Dropper stuck in steel frame :(

parkesie — Sat, 17 Aug 2013 14:37:10 +0000

Remove 1 bottle cage bolt squirt in some lighter fluid add spark see how far a seat post will go or die in a exploding ball of fire and pipe.

Re: Dropper stuck in steel frame :(

crashtestmonkey — Sat, 17 Aug 2013 13:51:19 +0000

Coke wont damage the post or the frame. It comes in aluminum cans FFS. It is a v weak phosphoric acid solution that will dissolve the oxide that's formed.

Re: Dropper stuck in steel frame :(

binners — Sat, 17 Aug 2013 11:48:02 +0000

I had an alloy post stuck fast in a steel frame, and asked the same question on here. I couldn't understand it either as i'd put plenty of grease in there. Someone suggested what Somafunk describes above. It may even have been the gentleman himself.

It worked a treat! Mind you, it didn't half go with a bang when it freed up!

Re: Dropper stuck in steel frame :(

kayak23 — Sat, 17 Aug 2013 11:27:17 +0000

Heating won't work as the aluminum of the post expands faster than the steel of the tube, so it would just become more stuckerer..
Fork oil too thick. Plusgas will hopefully work. You could try giving it a few sharp whacks with a hammer, protected with some wood, try to free it.
Otherwise, coke and that...

Re: Dropper stuck in steel frame :(

agentdagnamit — Sat, 17 Aug 2013 11:22:29 +0000

I had the same issue with a Blue Pig + Joplin. I wouldnt recommend clapping a dropper post by the saddle and twisting the frame...

I used the coke method, which worked for me.

Re: Dropper stuck in steel frame :(

boblo — Sat, 17 Aug 2013 10:09:08 +0000

Overnight in a chest freezer followed by heat gun? Saves doing any damage but might ruin the Brussels... :-)

Re: Dropper stuck in steel frame :(

HermanShake — Sat, 17 Aug 2013 08:32:02 +0000

Post is the right size, I ride all year round and the inside of the frame is a little rusty (dusty rust, not furry).

I think I'll try the soft clamp/vice twist thing but I'm concerned about mashing the keyway that stops the stanchion from twisting in the seatpost.

I've read coke will eat through both metals, plusgas sounds good though.

Thanks all for the replies so far :-)