I have them on stock TBA bars and I'm happy with them. Mine are turned outward just enough to see past my arms, and I think visibility is fine. I no longer have my stock mirrors so I can't measure them for comparison, but if I remember right the diameter of the stock mirrors is close to the width of these mirrors, but these are shorter, so with less flat glass area there is less visibility, but there is enough. I figure the only thing mirrors are good for anyway is so that if I see something in them I don't have to bother turning my head.
