Hi and welcome to iRV2.
I have moved your post in to its own thread so as not to hijack the thread it was posted in.
Making the sensors fit for some TPMS systems can be a challenge. On mine, the inside duals have metal stems which poke through slots in the outer dual and are held in place by a tight fitting rubber grommet. Inside duals are actually the easiest one to house the sensors on my rig but feel free to use our search function and you'll find tons of reading material on this topic.
Best of luck.
Rick, Nancy, Peanut & Lola our Westie Dogs & Bailey the Sheltie.
2007 Itasca Ellipse 40FD