Review on Continental 26-inch Bicycle Tube, 1.25-1.75-inch 42mm Presta Valve, Black by Shawn Tolbert

I had trouble mounting it with a nut against the rim because the valve stem base is too wide. I had to unscrew the nut, mount the tire and try to tighten the nut. The base of the stem base is now pushing against the inside of the tire bead - meaning the valve isn't tight against the rim - resulting in a very small stem going through my double wall touring rim. I have enough room to connect the pump with the lock nut mounted. It's very firm and lasts a week. Let's see if the tube is subjected to some weird strain and doesn't burst because it isn't resting on the rim.