• Sure there's not a crack in the frame somewhere? Does it click if you push on just one side of the bars? or only both together?

  • Sure there's not a crack in the frame

    It's a Geometron, I'd be surprised. I've checked headtube for cracks, checked welds and can't see anything. It only does it on hard fork compressions, OR turn the bars very lightly and rocking back and forth with no weight on it

  • OR turn the bars very lightly and rocking back and forth with no weight on it

    Strange, you’d really think it must be something headset related with this.

    Does the fork have a star nut in the steerer or is it one of the removable wedge type ones like the Hope head doctor?

    Sometimes the removable ones can be a bit shit, if it moves slightly in the steerer, it can prevent the headset from pre-loading correctly.

  • It's a Geometron, I'd be surprised. I've checked headtube for cracks, checked welds and can't see anything. It only does it on hard fork compressions, OR turn the bars very lightly and rocking back and forth with no weight on it

    What happens if you swap the wheel and skewer, then perform the same test?

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