Originally Posted by steelbikeguy

Has the OP considered something in the style of the mirrors that Chuck Harris used to make and sell? Chuck is gone, but the Hubbub bike shop sells a mirror that is similar but built with modern methods.

It "grips" the helmet along the front corner. A visor does get in the way, though. I'm using one of these on one helmet, and an old Chuck Harris on another helmet.

Steve in Peoria