WD wrote on 12/31/69 at 16:00:08:

Don't need to see much, just track what's behind you.  I check the mirrors about every three seconds in normal riding -- a bit less if interesting things are happening foreward; or on a limited access highway.  I find the stock mirrors to be quite satisfactory.

Mirrors can tell you if something is there.
Mirrors cannot tell you nothing is there.

WD wrote on 12/31/69 at 16:00:08:


I had the Ness Alternative Big Eye mirrors.  Looked okay on the bike, but there was vibration and distortion.  I mean, the visibility was perfectly adequate, but I think that was more because of the sheer size of the things.

Then one day while riding, the left mirror vibrated loose on the stem and started twisting.  Got home, Locktited the mirrors, and went back out.  An hour later the right mirror vibrated loose, and nothing would fix it.  Took 'em off, put the stock mirrors back on.  

I had a hell of a time trying to find decent mirrors.  I wanted something that would look good, offer decent visibility, and not have any quality issues.  Nobody I asked could recommend a mirror that met all three criteria.