Originally Posted by
sauerwald
I was never able to get the hang of a helmet mounted mirror. I use a 'Sprintech' bar end mirror on the left bar end of my drop bars. I like it a lot.

+1
I tried a mirror that mounted on the temple of my sunglasses, but it was so far to the side that I nearly sprained
the muscles around my eyeball trying to use it.
I bought a Sprintech after seeing recommendations for it on BF, and *love* it!
Occasionally, I regret that I didn't buy a left/right pair.
Installation is a piece of cake: Pop out the bar-end plug; Push in the mirror.
My regular route has a 45mph descent on a very busy road with no shoulder,
that ends at an intersection where I need to cross two busy lanes to get into the left turn lane.
It is great to be able to maintain awareness of overtaking traffic while down in the drops w/o moving my head.