You are reading a single comment by @crossedthread and its replies.
Click here to read the full conversation.
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
crossedthread
falconvitesse
Assuming your stuck seat post is ali, you should try vinegar.
It's a pity you put penetrating oil in first, because it will tend to protect the corrosion from the acid in the vinegar, but even so I think a week or so should see the pin free.
'Inject' a whole bottle of cheap vinegar through the hole you've made, plug the hole, turn frame upside down and wait patiently.
Bottom Bracket Shell
Probably all lugless frames are like yours, why would there be access to the frame tubes? I doubt very much that the shell is a casting - it's almost certainly just a bit of tubing.
A potential problem here is that if water gets into the seat tube (eg past the seat pin) it can't get out - it will sit at the bottom of the tube and cause rusting - it's not rare for frames to break for this reason. Perhaps it's worth drilling through the shell to allow any water to escape (n.b. bearing would need to be sealed).