Review on 🚲 TAC 9 Tube for Bicycles - 700c x 18-23, Presta Valve, 32, 48, 60 or 80mm Length - Choose Valve Size and Money-Saving Option in 1 Pack or 2 Pack by Michael Santos

The hoses are gradually losing pressure through the tip. I rode the bike about 20 miles and the pressure went from 110psi to about 20. The pressure was slowly released every time I filled it up for 3 or 4 days. I took the tube out and submerged it in water and there was a very small leak in the metal area of the tip, not at the clamp screw but just below where it looks like a metal cylinder is welded to another metal cylinder. There's obviously no way to fix this, so I hung up. Exactly the same problem with the second tube. Aggravating.