Beads can also get caught in valve core, I was filling a tire and a bead got in the valve core so it wouldn't close. Had to remove the core to get the offending bead out and put core back. Luckily it was in my drive way so not a big deal, if I was inflating at gas station I would have been changing a tire.
When I change tires there is a little bit of rubber dust mixed in with the beads so it taking a little bit off the liner.
The Counteract beads are plastic, look like the raw material for a injection molding. Dynabeads say theirs are a ceramic.
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