Sounds to me that the lockring isn't tight enough, and the sprocket is undoing and tightening in the tiny gap that exists between sprocket and lockring.
Tighten the sprocket down (go up a fucking big hill, stamp on your pedals while facing a wall, or rotafix it), then tighten down the lockring with a proper tool.
Sounds to me that the lockring isn't tight enough, and the sprocket is undoing and tightening in the tiny gap that exists between sprocket and lockring.
Tighten the sprocket down (go up a fucking big hill, stamp on your pedals while facing a wall, or rotafix it), then tighten down the lockring with a proper tool.