I've been watching this thread since I'm going to buy a TPMS.
Out of curiosity, I've got a couple of questions if anyone has answers:
1. I presently have a SmarTire RV TPMS. It has the straps that go around the rim (inside the tire). Bendix no longer supports this system and mine doesn't work right so I can't get it fixed. Should all tires be broke down from the rim and the straps removed or can I just add a valve stem TPMS?
2. How do you put the sensors on the inside dually? The holes in my outside rim are certainly not big enough to get my hand in there. Do I need to change my stems to the kind that that stick through the outer rim? Right now the stems are pretty short and I have to use a long gauge and air chuck to service the inside dually. The outside dually has the 'reverse" valve stem. I have to use a reverse-oriented (dual foot) air chuck and gauge for it. Do they need to be changed to point to the outside.
3. One last question. When comparing reviews on Amazon with TST 507, EEZ RV and TireTraker TT-500 systems I have found EEZ RV typically gets better reviews than TST. TireTraker also gets better reviews (but not as many and may be newer to the market) and it has a lifetime warranty. For TST folks that have used more than one system, why do you like TST over the EEZ RV or TireTraker? The costs are comparable and I just want to get the best bang for the buck. I especially want to get a quick readout. I don't want to have to drive 20 miles before I know my air pressure. In short, why are most folks liking TST over other systems OTHER than that's what you have and you like it?
I also noticed on another big RV forum, the folks over there seem to like EEZ RV better so I know it all depends on to whom you're talking and what is recommended.