So I had my front tire tube repaired on Thursday night. Rode it that night maybe about 1/2 mile. Maybe just over. It was a short cruise through the neighborhood.

I did the same thing on Friday night and didn’t notice any problems.

Tonight, I randomly moved the bike and realized it was flat. I went to inflate the tire but was unsuccessful. Tried again. And again. And one last time. Nothing. Poked around the Presta stem and noticed no lock nut. I’ve read it’s nothing to be concerned with but after those two rides I’m a bit stumped, and pissed, on why it’s flat and clearly with a hole again.

Any thoughts?