Valve Stems

I believe Trailmanor needs to check the valve stems on their tires.
Both of mine deterioted within a year and a half. I was told by the place that replaced mine that any tire over 40lbs pressure should have a metal stem. Don't know about that but it makes sense. You'll know when your valve stem is shot when you try to put air in the tire and it leaks out around the valve stem.