phinboo

I've got a Specialized carbon seatpost that is frozen in a steel frame. Any suggestions for freeing it short of sawing it off and apart?

Asi

Try to twist the seatpost by twisting the saddle while holding the frame.

Last resort to save the seatpost: fit the seapost into a vice and rotate the bike around it.

Once it can twist then it almost free and will come out. The only problem is that the saddle clamp is metal and the seat post is carbon, and it can get loose where you don't want to. Being carbon seatpost it should not have seized like a metal one (by corrosion), so it should be easy to get it out. If not then the seatpost will fail before the frame does so no need to worry about ruining the frame.

Last resort to get out the seatpost is cutting the seatpost, and then cutting the inside of the remaining stuck seatpost.

wheelgrabber

You should do a search on the forum. This has been covered numerous times. I believe the last guy's father got impatient with the hacksaw and used a sawzall to cut through his son's steel seat tube. I prefer the seat post in the vice trick. It works well with stuck bottom brackets as well. It's like having a huge wrench.

badamsjr

I had one carbon seatpost seize up in an aluminum frame. I was able to remove it after a lot of forcing, and the surface of the seatpost had portions missing. Now I make SURE to lube all my seatposts when assembling.

operator

There is some ridiculously bad advice in this thread after only 3 replies.

1) Twisting a carbon post out, unless it's with the MILDEST of torque will shear the post. Good luck getting the post out then.
2) Carbon parts are assembled with carbon assembly compound, NOT grease. Assembly compound reduces necessary torque on bolts and prevents slipping. In addition to acting as a mild anti-seize.
3) Effeto mariposa makes a carbon anti-seizing product - research that.
4) Clamping the carbon post in a vice will destroy it.

phinboo

I did search the forum with no specific results found. I was hoping for a response with something novel, but have not recieved it.

badamsjr

operator: before you flame someone for giving bad advice, you may want to READ their post. Looking over the replies, I seem to be the only one who suggested lubing a post. I never said to use grease. I suppose I could have assumed a newbie might think 'lube' meant grease, but I did not. I made the choice to think a person who was unsure about the term 'lube' would research it for the material they were using, or ask for further help. If 'lube' actually does mean grease, then "my bad", but as you have pointed out, there are many different compounds (dare I say 'lubes'?) for various applications.

sherbornpeddler

https://www.bikeforums.net/showthread...light=seatpost

here is what I did about a post cracked off at the clamp

wheelgrabber

Operator,

Should I assume that you have clamped a carbon post in a vice and crushed it. Perhaps I should assume that you have clamped a carbon post in a vice and sheared it off as you turned it.

No, I will assume that you are assuming that these solutions will not work. At the end of the day he will probably end up cutting the thing out with a hacksaw. Recommending grease after the fact is a good comment; however, it is not a solution to his current problem.

badamsjr

"Is it better to solve a current problem, or to prevent a future one?"

sherbornpeddler

don't fix it if it ain't broke....

Crankycrank

Dribble some penetrating oil in the seat tube from the BB end and let the bike sit upside down overnight. Then pour boiling water over the seat tube and try twisting the post. Make at least three attempts before giving up.