I often wonder if the stock tubes would last longer if the time was taken to unseat the tire bead and add some talcum powder. It wouldn't stop puncture damage issues or pinch flats, but may extend the life otherwise. My front also blew out on mine and when I pulled the tubes there was no evidence of any kind of powder inside the tire.
They are still cheap crappy tubes, but one would expect more life out of them than a few hundred miles.
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