Originally Posted by
dsaul
Since we're guessing, I'll also guess that its a carbon steerer and the expander plug is slipping. Try carbon assembly paste on both the plug and the stem. My solution to this problem was to install a Deda expander.
https://www.universalcycles.com/shop...s.php?id=29439
Not all the manufacturers recommend carbon mounting paste on steerer-stem interface. The grit from the paste finds its way down to the headset bearing and can ruin it. More on that topic:
Upper Headset Bearings Last Forever, Except When They Don?t ? Killa?s Garage
With a constructive discussion in the comment section below, where my eyes were opened.
