okay, thanks guys, yes, I have rubber valve stems. So I'm looking at something like this:
https://www.rvupgradestore.com/index...OD&ProdID=1671
I'm guessing they don't recommend using these with rubber valve stems because they might wiggle too much and fly around when you're driving. But, I think I should be okay because the drilled hole in my hubcaps will keep them relatively secure.
Could there be any issues with leakage?