I ride a Giant road bike with OD2 carbon steerer. It was originally built up with a standard expander plug, but was supplied with the glue-in Aircap expander as well. Im not sure whether to use it and there is very little information about these online.
I've only been able to find two things about it so far. Apparently it's a bit lighter, but I couldn't find how much lighter. It seems to also be a lot more hassle if you install it then want to cut the steerer again. If that's the only downside to it, then I'm happy to use it because my steerer is already cut down to have no spacers underneath. Is there anything else that should affect my decision to use this or not?