Seat post stuck

[Willa1977]

Please help, my aluminium seat post is stuck in a carbon frame and cant get it to move, anyone else had such problem and how was it resolved?

 

i have tried lubrication, force with a hammer, does not want to move at all.

 

any suggestions will be appreciated.

[Eddy Gordo]

Not sure what exactly you can do to try and free it but it sounds like it has fused to the carbon.

[shaper]

here a thread on the exact problem you have https://community.bikehub.co.za/topic/43399-seat-post-stuck-in-carbon-frame/?hl=stuck%20seatpost

[droo]

There are a few ways of getting it out, most of which involve destroying the seatpost.

 

PM Dave Marshall or Ampandy, between the two of them they'll sort you out.

[Baracuda]

Lube (WD40) and then twisting it with a monkey wrench may work. The wrench will mark / gouge an alu seat post, but will probably be able to twist it.

[T-Bob]

Proper nightmare. I had a carbon on carbon stick, tried everything even down to getting a tape measure, siting off the end and slipping that down between the post and tube to find the issue. 

 

In the end and the 3rd mechanic, trail and tar, just wacked it with a good sized hammer... work a treat but had to promise if it when like the Poms RWC campaign, I wouldn't blame him.

[PeterF]

A hacksaw blade and lots of cursing. Then with the next one make sure you use fibre paste and check regularly that it is moves freely.

[rouxtjie]

WD40...leave overnight..

 

Failing that....moering tool and hope for the best.

[Long Wheel Base]

The bigger the problem the bigger the Hammer.

Maybe try a rubber mallet, might add a bit of shock to the problem.

[Rocket-Boy]

Alu reacts quite well to heat, attach an old saddle and boil a kettle then pour it over the seat tube. Carbon hardly reacts to heat so it wont expand very much, might give you enough clearance.

[Wannabe]

Alu reacts quite well to heat, attach an old saddle and boil a kettle then pour it over the seat tube. Carbon hardly reacts to heat so it wont expand very much, might give you enough clearance.

 

Won't the alu seatpost then expand and the carbon frame not, making the fit even tighter?

[Rocket-Boy]

Won't the alu seatpost then expand and the carbon frame not, making the fit even tighter?

You are 100% correct, seems I got the order wrong, thought it was an alu frame with carbon post.

Heating wont work there but cooling might help, bags of ice on the seatpost is worth a try.

[V12man]

Won't the alu seatpost then expand and the carbon frame not, making the fit even tighter?

You just want the expansion/contraction cycle to break the corrosion holding them together - me - I would try some dry ice on the seatpost too - and a hair dryer on the outside...