I have a set of Walker Evens 17" beadlocks and 39.5 x 13.5 irocks. The problem I am having is if I run below 7 psi I blow the inner bead pretty easy. I would like to run 5 psi but then I have to reset beads all day. I bought the rims used so I don't know how wide they are, but the tires seem to...