Originally Posted by NomarsGirl

I use a helmet-mounted mirror. It's tiny, but shows me what I need to see. I just need to know if there is a car behind me when I come to an intersection.

I ride mostly on MUPs and don't need it at all there except to see if my husband is still within sight or if I should slow down and let him catch up.

Originally Posted by Jim from Boston

I use both left and right rearview mirrors, in my case Take-a-Look eyeglass mounted ones...

This past weekend I rode with a companion on a low-riding recumbent three-wheel trike. I just deflected my right-hand mirror slightly downwards so I didn’t have to crane my neck upwards to see him. The left-hand mirror was still in place to monitor rearward traffic.