Rear Dual Valve Extentions

I removed mine when I installed the Pressure Pro tire monitoring system. I place the sensors directly on the valve stems, easy to reach in if the wheel is rotated to the right position. I remove in the winter and place a cap over the stems. In the spring I check the pressure using a Griot garage digital gage along with a flexible screw on valve adapter hose from Presta Cycle, very simple, no lost air for the most part.