I have one front Super Trick / new Moroso tire that looses about 2 psi over a 24 hour period. The other front SuperTrick / tire stays perfectly inflated
First I bought a small blow-up pool and submerged it, standing on it inflated. No air bubbles in over 5 minutes.
Next I had it dismounted and applied /sprayed the complete inside of the rim with 3 coats of clear flex-seal....no improvement what so ever
Next up, I'm gonna try the tire on a steel rim just to remove the tire from the equation, once the tire at proves good, while still dismounted, I will apply a different / better type of sealer to the inside of the rim.
I will fix the MFer
I have read about this issue for years and like most just hate tubes.