Place the circle at the valve stem, then instead of beads, run "Ride On".. It's like Slime, but not bad for your rim, etc..
It balances your tire AND is a sealant as well.. Might as well do both!!
I have it in both of my Victory Tires and it seems to do great.. I haven't had any nails, but my job is right next to a Screen and Window warehouse, so there are objects in the parking lot constantly..