... but not for commuting, at least not necessarily. I'll be riding a century with my better half and she is a slower rider than I. I'd like to get a mirror to keep my eye on her when I'm ahead of her. However, I don't want something stuck to my helmet forever or to my bike at all. Any removable mirrors I might try? TIA.
P.S. Who knows? if I like it, maybe I'll use it while commuting too.