My bike's headset just won't stay tight - it is all carbon (fork and steerer and frame) and no matter what it loosens. It appears to be because of a cheap plug or nut or whatever it's called. A guy working on my bike suggested if it loosened after my last long ride I should look into a expander plug. It loosened after it had just been tightened, so now I am looking for one. I found one from FSA but was wondering if anyone has any suggestions for such a plug for use in a carbon steerer, or if they are just all the same. Thanks. Here's the one I was thinking of getting:
http://www.amazon.com/FSA-Compressor.../dp/B002SR1GT2