Originally Posted by pontzdav
I’ve run 30,000 miles with Eez Tire Tms in original rubber valve stems. No issues.
TST claims you don't need to install metal stems, since the cap sensor only weighs 0.54 oz.
But in the words of Mick Jagger, "Anything worth doing is worth overdoing!"
On the topic of airing dual wheels, my previous motor home had extensions on the inner dual. A flexible steel tube as shown above by WoodrowB. It attached to a lug nut so it didn't move. I'd air both duals from outside. Never leaked.