Originally Posted by
NoControl
I've had bikes with seat posts in this predicament many times. Kroil and a slide hammer usually works well enough. I've built myself cutting chisels out of naval bronze rod. It'll part the aluminum seatpost and do no harm to the steel tubing. Just don't get over-zealous with your hammering, or the bronze rod will deform the seat tube from the inside. That will ruin your day, and don't ask me how I know. I have never tried the use of caustic soda to remove the seatpost. Youtube is a good source if you want to know how to do it. I'm just ticklish about the idea of putting that stuff inside my frame and prefer mechanical methods.
Thanks for the advice good idea about sliding hammer but only have tools as shown
I am a bit worried about using a new saw blade owing to the 0.6mm tube thickness I don't care how long it takes I just don't want to ruin frame, I will briefly try it then if I still have doubts I will use the drill since there is not much meat at top to pull on.
The drill seems at this point to be the easiest and safest method but I could be wrong, I might even leave it for a week and come back with fresh eyes.
I am going very slow on this if I spend too much time in one session I will get frustrated and do something stupid like last time hammering down seat post on a different bike.
Now I know why most LBS won't do this it takes too much time for what they can charge and the possibility of ruining frame