Apologies if this method has been posted before but here goes, its just a variation on a theme. All I will say is it worked for me.
It strikes me that if you hold the bike and try to twist the post by whatever means you are not applying the force effectively, you end up 'fighting' the bike so what you need is a bl**dy great vice, mine is an 8" record. All manner of levers crowbars and hammers had previously failed.
The seat post was alloy( with the Kalloy/Kalin type seat mounting) in a GT frame.
The first stage is a bit drastic. If there is a saddle in place and the post at its lowest point you can't grip the mounting in the vice. Get out a hacksaw cut through the saddle, rails and all, then 'drift' the remaining rail from the seatpost, there is now enough play to unscrew the bolt from the thread end and remove the mounting, in my case the bolt remains in situ.
Simply invert the frame, grip the saddle mount in the vice and rotate the frame (having previously used the chemical of your choice to penetrate the corrosion). Voila , after a few creaks and groans the post is free.
I don't see any reason why it shouldn't work on an exposed post but obviously it would be crushed by the jaws
Disclaimer- don't apply so much force you twist the frame, be careful where you hold it.
Paul
It strikes me that if you hold the bike and try to twist the post by whatever means you are not applying the force effectively, you end up 'fighting' the bike so what you need is a bl**dy great vice, mine is an 8" record. All manner of levers crowbars and hammers had previously failed.
The seat post was alloy( with the Kalloy/Kalin type seat mounting) in a GT frame.
The first stage is a bit drastic. If there is a saddle in place and the post at its lowest point you can't grip the mounting in the vice. Get out a hacksaw cut through the saddle, rails and all, then 'drift' the remaining rail from the seatpost, there is now enough play to unscrew the bolt from the thread end and remove the mounting, in my case the bolt remains in situ.
Simply invert the frame, grip the saddle mount in the vice and rotate the frame (having previously used the chemical of your choice to penetrate the corrosion). Voila , after a few creaks and groans the post is free.
I don't see any reason why it shouldn't work on an exposed post but obviously it would be crushed by the jaws
Disclaimer- don't apply so much force you twist the frame, be careful where you hold it.
Paul
but sometimes the post is so stuck that even the method you describe does not budge it. :?
