New TPMS at the start of this trip, so far 4200 miles with rubber valve stems, non-flow through sensors. I didn't have time to change to metal stems before leaving on this trip. No noticeable indications of anything wearing or rubbing so far. Now I guess I will change to metal stems when I need new tires, unless I see something that makes me think otherwise.
2016 Windjammer 3006WK
2010 Dodge Ram 2500, 4x4, Diesel, Front Hitch, Air Lift 5000 Rear Air Bags.
Equalizer E4 1.4k/14k WD Hitch.
TST 507 TPMS
Furrion FOS48TA Observation Camera
Garmin RV-760 GPS