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..........
All you really need for backup is one tube. Stick it in your framebag and break glass in case of emergency. IME, most problems with tubeless tires that deflate after doing fine for a while are due to a valve core issue. The rest are about dried sealant. Add a few ounces of sealant every six months and you're good to go.
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