Originally Posted by
caloso
Here's a question for the mirror users: I imagine that the angle has to be set correctly on 2 axes (x: side to side; and y: up and down). X seems straightforward enough since you're generally looking straight ahead and then you use a slight side to side to sweep behind. But what about Y? Do you only keep your head in one position? What about if you lower into the drops? If you tip your head forward, doesn't that mean the reflection is of the sky behind?
I position mine based on riding on the hoods of my road bike. While on the bar tops my head is at pretty much the same angle. When down in the drops (rarely) I might have to crane my neck up just a bit higher to see straight back behind me, but I don't hold my head in that position.
On my utility bike where I sit almost straight upright, I do find that I have to hold my head at a slightly different angle to see straight back behind me, but it's generally not an issue.