Originally Posted by
canklecat
I still see many cyclists who don't use mirrors, but they have full neck flexibility and are comfortable looking behind. Due to permanent C2 damage I cannot look over my shoulder or look upward without pain, so I need the mirrors.
I use the handlebar mirror to keep from having to turn and look unnecessarily several times; check the mirror until I see the clearing I need, then turn and verify, rather than having to look back each time. Last time I broke one, replacing it was a no brainer after just one commute without it.