im not complaining cuz the 39, but boggers are a ton heavier and wider than all the other tires in addition to my 4.10s, it doesnt work out well. the push pull steering makes u-turns impossible with such a wide tire
rotate the tires when you can, the ones on my truck are pretty much done in the front, but the rears still have good tread. i guess that would mean running reverse pattern every other time, but if they will last an extra 5k miles then its worth it.
as for 30psi, i think that might be a little bit high. i know with my iroks i ran 23psi and that seemed to be the best for tire wear. id try maybe 25psi or something.