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Rigidee
To be fair, the general thrust of this thread is that pretty much any road tubeless set will be shite 🙂
The specific issue with dodgy bead seat profiles is that the beads will drop into the well when you lose pressure, either through a puncture or natural wastage. The former is dangerous (although not necessarily any worse than the same rim and tyre with a tube in it), the latter is just annoying because you'll have spent an hour getting the bloody things to pop up onto the shelf in the first place, and now you're back to square one.