I would contact the manufacturer of the bars. Easton, for example, says their EC70 carbon fiber flat mountain bike handlebar is compatible with bar ends (not the same kind of bar ends you're talking about, of course), but their lighter weight EC90 carbon fiber flat mtb handlebar is not. I doubt there are many who put bar end shifters on carbon fiber drop style handlebars, so it's probably not something the manufacurers have in mind when they design the bars. Again, I'd contact the mfr. and see what they have to say about it-
Last edited by well biked; 10-18-07 at 05:37 AM.