[https://www.sheldonbrown.com/stuck-seatposts.html]
You’ve prob already read but just in case
@DanM started
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.
[https://www.sheldonbrown.com/stuck-seatposts.html]
You’ve prob already read but just in case