I believe this was initially caused by vibration travelling down unpaved BLM and Forest Service rads earlier this year.  However, I have tightened every bolt I could access and the chair still creates a constant racket even on paved roads.

The seat swivels and reclines and I suspect the squeak may be coming from the connection between the springs and their anchor.

Can anyone advise me on how to quiet this loud and annoying squeaking?