Originally Posted by
nathand
A metal steerer tube has a star nut in it. Rather than using a compression plug, the bolt through the top cap screws into the star nut, which is held securely in the steerer. This creates compression on the bearings. You don't use a star nut in a carbon steerer because the sharp edges dig into the carbon.
You might be able to replace the bolt through your existing compression plug, with the bolt that's provided with the adjustable stem. If you can do that, the whole system will likely work fine, with the compression plug working normally.
That's exactly what I was looking for, thank you. Wondered if I could replace the bolt in the current plug with the bolt on their stem specifically, so thanks! It probably depends how long that bolt is because it would have to reach the bottom of the compression plug.