I've been trying to use a helmet mirror (I don't remember the brand or model) for commuting for about the last year. I've come to the conclusion that it basically doesn't work. If I adjust the position inboard enough to easily see, my rear view is blocked by my shoulder when in the drops or on the hoods. If I wear a backpack, it is utterly useless. If I adjust the mirror outboard to provide a clear view, I can't really look directly at it without really straining my eyes, so I end up not using it. When I finally do get it into the sweet spot, I invariably bump it when donning, doffing, or carrying my helmet, necessitating another aggrivating round of adjusting.
So, what works? In my searches I've found some bar-end mirrors, but my bike has bar-end shifters. I also use grab-ons, and would rather not cut that to fit around a clamp. But, I realize I may have to compromise on that, or switch to bar tape. Also, how practical are bar-mounted mirrors as far as steering to aim the mirror? Is there some other option, like arm or hand mount?
Thanks in advance,