Remove saddle, clean, replace, tighten correctly.
It could also be loose where the rails meet the saddle itself. This is a bit trickier to fix.. see if there's any dirt that can be removed first. Then try wedging stuff in to stop any movemnt (if possible).
@hippy 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.
Remove saddle, clean, replace, tighten correctly.
It could also be loose where the rails meet the saddle itself. This is a bit trickier to fix.. see if there's any dirt that can be removed first. Then try wedging stuff in to stop any movemnt (if possible).