I have a 1999 Trek 930 with a seized seatpost.
I've tried everything from using hot water, soaking it in diesel fuel, soaking it vinegar and lemon mix and finally heating up the post with a torch till the vinegar was boiling inside the tube turned upside-down. Then I'd dip only the post into a bucket full of ice water. It won't spin. The seat clamp is still there and I've used it to latch a long pipe in attempt to twist it. Again, no success.
So I'm thinking of using caustic soda as shown in this video: https://www.youtube.com/watch?v=-dYnSVVDxrE
However, I need to know if the frame is steel or otherwise the caustic soda will eat through it too (in addition to the seatpost).
Do you know guys know if the frame is steel?
Or maybe any other ideas for removing this stuck seatpost?
Thanks,
I've tried everything from using hot water, soaking it in diesel fuel, soaking it vinegar and lemon mix and finally heating up the post with a torch till the vinegar was boiling inside the tube turned upside-down. Then I'd dip only the post into a bucket full of ice water. It won't spin. The seat clamp is still there and I've used it to latch a long pipe in attempt to twist it. Again, no success.
So I'm thinking of using caustic soda as shown in this video: https://www.youtube.com/watch?v=-dYnSVVDxrE
However, I need to know if the frame is steel or otherwise the caustic soda will eat through it too (in addition to the seatpost).
Do you know guys know if the frame is steel?
Or maybe any other ideas for removing this stuck seatpost?
Thanks,