I have used the small hot rod mirrors on a lot of hot rods. They tend to work loose at the mounting location and bounce a lot, after they are about 6 months old. What you can see is very minimal much past the rear of the vehicle your driving. You see a color blurb coming up behind you and until it gets close, you can't really tell how fast or how close they are. Using them to back up sucks.

I'm not a big fan of small mirrors, I think you may have better rear vision with your broken large mirrors. Of course, your results may differ, just my Gene