Technical & Reference Section > Tech and Restoration

Stuck in seatpost

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Juju:
If its an ali frame, then anything with ammonia is meant to be good.

In roadie circles, this man was a legend and he virtually wrote the book on stuck seatposts. -

http://www.sheldonbrown.com/

and for you...  this link is the cats clit !

http://sheldonbrown.com/stuck-seatposts.html

all credit to the master of bike repair!

fouronethreeoh!:
Was just trying to say how stuck in my post is.
Its well stuck, i froze it to -192c in liquid nitrogen to shrink it but it was still solid.
Had it up to 10 tonne in a press but still no movement.
So im going to try caustic soda to see if it will free it up a bit, its a steel frame so no probs there.

hunterdubber:
I wouldn't buy a frame with a seatpost stuck again done it twice and both times was a nightmare
with both combinations , Alloy frame and cromo post ,,,cromo frame and alloy post

Did the press , ammonia , weld another bar to it , to twist it out , ,soak in WD40 for days,,,,etc etc
tried em all

heat actually did work on the cromo framed one in the end

but the alloy framed one I had to get my brother in law engineer to drill down the seatpost tube vertically as far as possible so the old post was removed
He said never again ,,they had 3 holding the frame under a stand drill , so it wouldn't whizz 'em round the room  :LolLolLolLol: 


Good luck

80sdave:
Dude get yourself a handheld gas torch from homebase and gently heat the frame (seat tube section) keeping the flame constantly moving dont concentrate on one spot. We do it on bikes that come in to us for the same problem, might loose a decal or two and if you stay in one place to long you will risk bubbling the paint but usually takes 3-5 minutes tops then straight away with seatpost in vice get twisting using the frame as leverage rather than trying to turn the little seatpost and that should sort it.

Rombloke:
caustic is the way to go on the chromo frame alloy post scenario...i think phil fruit has pics

Dave

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