So, I have a Cannondale Six-13 with carbon steerer tube. The frame came with a compression plug (first pic) but is missing the top cap. I went to the LBS, and bought a Reynolds OUZO compression plug, but the way it's designed, only one end expands, which seems like it will give a pretty small contact area inside the steerer tube because it will not expand evenly. The plug I have expands from both ends and the expanding part is about 30 % more surface area than the Reynolds. Is the Reynolds safe ? I think something like the Pinarello (bottom link) would be the best.
Thoughts ? Can I find a cap for whatever brand plug I have ?
Reynolds:
Pinarello: