Tire Pressure Valve Cap

I have been using a Tiregard TT pressure monitor with screw on valve stem caps on my Harley Electra Glide for going on six years now with rubber valve stems. Only had to change the little battery in the caps once, a couple times the one AAA in the receiver.

Only ever used one set. Maybe duds or cheapos but they weren't reliable. Haven't tried since.

I have for the last couple of years. They work great but I think you need metal valve stems to take the inertial load.