I have an old Simplon bike with aluminum frame and carbon seatpost. I haven't greased the seatpost in years and now cannot move the seatpost at all. It's completely seized. There is a high chance the aluminum is heavily corroded due to the years of contact with the carbon and the conditions I have left the bike outside in.
Does anybody have experience with removing the seatpost in such scenarios? If all fails, I am willing to cut open the seatpost to tear it out…
by Responsible-Text1728
3 Comments
I’d do two things. One, seatpost in a bench vise and twist the frame. If this doesn’t work, I’d cut the seatpost and use a hacksaw blade to slot the seatpost from the inside and peel/pull it out. Carbon cuts pretty easy with a hacksaw blade, requiring a lot less pressure than aluminum, so you should pretty easily be able to destructively disassemble the post while not marring the frame.
Be VERY careful with carbon fiber dust, mask and glove up.
Heat the aluminum frame part, it will dilate a little bit, maybe enough to turn the seatpost