Originally Posted by
George Mann
Schrader valves. The tube failed when it shifted, damaging the base of the valve. My tires are CST Sensamo Controls (puncture resistant liner).
50 psi in a 2” tire shouldn’t shift. If you had a slow leaker flat, you could drop pressure enough to get some tube creep which might cause your problem. Additionally if the valve stem weren’t at 90° to the rim when you pumped up the tire, that can stress the valve stem as well. It’s very common to cut an angled valve stem, even with proper inflation.