Originally Posted by
offwhite
thanks for the responses!........turns out I'd inadvertently loosened the presta valve core, not taken on something sharp. The tire completely deflated overnight, almost like it inhaled [[i]very strange], but - the bead stayed in tact! good news for the tubeless execution. I'll be adding some fresh sealant and carrying on [as recommended by my LBS] perhaps with some tubes for backup..........
IME, this is the reason most people lose air in a tubeless setup (one that actually "sets" and initially seems to work). You really have to make sure the valve core is tightened down. Not doing so often results in a slow leak. I don't ride tubeless for flat protection, as that hasn't been an issue for me here in Minnesota, and not really to save weight either. I just don't like riding tubes at low pressure because the tires and tubes fighting each other feels like raccoons wrestling in a gunny sack, to say nothing of the squishy squeegy sound.