Replace your tire stems, learn from my mistake.
Front tire went flat (10 psi). Spent an hour checking for a leak in the tire, nothing.
Filled the tire, let it sit over night, it was fine. Road about 100 miles, all slab work, tire still holding pressure. Left for neXXt, tire was fine. Checked it when I got there still good. Did an aggressive ride friday, front end felt goofy, checked the pressure, 10 psi. Replaced the tire, road the saturday ride, got up sunday, tire flat. Don gave me a new stem, replaced it and haven’t had a problem since.
BTY you need a tire stem tool to replace them, 2 minute job
fuzz