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I have a KS dropper post which is seized in a carbon frame. I think I am going to have to cut it out to get it out of the frame.
One point of concern is that to cut the seat post horizontal above the frame will involve cutting through the pressurised cylinder, might this be exciting when the pressure is released, also I would then need to get the bottom part of the cylinder out of the inside of the post so I can then hacksaw vertically to remove the post.
Any thoughts would be appreciated. !!
Drill a hole first to let the pressure out?
there's not a lot of air in a post so it won't be a massive rush or anything.
I had a normal post seized in my carbon Camber. I hit it with a hammer and it released . I'd try that before cutting.
sounds like a drastic solution. Assume you have tried letting oil and/or WD40 soak down the post to try and free it up. Not entirely sure if carbon likes WD40 however!
Good luck!
Strip the frame and put the head top of the post in a vice so you can use the frame as a lever is the other alternative to cutting anything up.
I think the on KS posts the valve is under the saddle isn't it? So you can at least get the worst of the pressure out.
If it helps, I was on the verge of attempting to cut a lev out of a carbon frame and thought 'sod it, if it's going to be written off anyway I'll see how much twist the bushes can take'. Wedged the bike as best I could and gave the saddle an almighty twist as sharply as possible- turned out to be enough to break the stiction. It had been heated, cooled, soaked in wd40 etc for a few days in cycles before that, which probably helped.
Try riding it with the seat clamp undone? it still works as it should, hopefully a few rides will get it moving.
Thanks for the advise, I will try all of above first !!
If you don't want to risk damage to the frame then send it to the seatpostman
Seatpost man is well worth a shout mate, he’s great!
I used a big pair of stillys whilst a mate sat on the top tube n held the frame
It was ****in tight