Cummins12V98 wrote:
If you use the "proper" inflation device the inner wheels are a piece of cake to inflate and deflate. You DON'T need extenders. There is no screw on cap you just push on double ended air chuck. To deflate I use the chuck without an air hose attached.
Give this a try it really is EZ!!!
Your sensors are inside of the wheels.

Is your inner wheel valve stem metal or rubber? My outer is metal and the inner is rubber. It would have been better if they had put them the other way with rubber on the outside and metal on the inside.
I have the double headed air pressure gauge and the double headed air chuck. I have had duallies for years but I have always had metal in the past on both inners and outters. My last rig was a International Durastar that had a MH built on the chassis with 22.5 tires. The inside dual had metal valve stems and I never had a problem with it. This new one with the rubber valves it just wobbles all over the place when you put pressure on it and when trying to air up it is leaking more air than you are getting in. Kind of a losing battle with less air than when I started and that was just trying to get a reading.
Kind of a pain in the you know where. I have already tried it and had to fight it each time I have done it.
I would also like to put my after market TPMS doggles on it that I have used in the past to monitor my pressures as I drive. They don't play good with rubber valve stems and are not recommended for them. I have had after market TPMS for years and they have really worked good for me. On one of my rigs I checked the tire pressure in the morning and all checked good but as I was driving down the road after about 3 to 4 hours of driving I got an alarm on one of my trailer tires. Pulled over and checked the pressure and it was down to 70 from 80 that I had checked earlier. I started to put in air and could hear air leaking. Some way or another the nut on my steel valve had become a little loose and it was leaking air there. I just got a wrench out and tightened it a bit and filled up the tire and all was great again. So here is a case where a TPMS system could have saved me a very expensive repair down the road.
I have metal ones on order right now for my new 5er and should be here Monday so I can have the metal installed and then can use my TPMS on the 5er again.