I use to have the kind that sticks on your helmet and I don't recommend those. They suck b/c the mirror is so small, you can barely see anything coming from the rear. Thanks for the links.
I bought a end cap mirror on ebay since people said they were good. The one I got I paid like five bucks for just to see if it would work. I learned that the one that goes up and down but hangs off the end gets in the way. Now I want one that sticks out straight from the bar. I can use the one I got on an electro and get a good one for the Sissy.
I have the seventies style one with the reflector about the size of a nickel on the top. I mounted them on innertube rubber to cut down on vibration. They have a strap.
what type of mirrors to use tip
straight moutian bike type bars use the bar end ones.
cruiser type handle bars that the ends point back use the handle bar mount type.