If you can get used to a helmet or glasses-mounted mirror, they are best option, IMO.

I never could, though. I tried a Take-A-Look for a couple weeks and I just found it really distracting and kind of gave me a headache.

As far as bar-mounted mirrors on drop bars, I’ve tried a few, some that mount on the ends of the drops, one that attached to the hoods. They all have significant drawbacks, though.

So give a Take-A-Look a try first. even if you don’t like it for riding, I found it useful for looking inside my guitar and upright bass.