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A GuestThey do the job well. They come with a large radius on them, somehwere betweeen fitting an aluminum and steel downtube, so if you want them fitting your specific bike, you may need to do some file work. If not, they'll fit without a noticable gap. My Klein has bosses which are flat, so I just filed the radius off and they work fine. They are a bit heavier than expected and I'm not so much into large branding on my bikes... PS is a good company, but the whole idea of boss covers is that you want to clean up appearances... not necessarily provide more real estate for branding. However, I knew that going in, and they do make the bike better looking.