Your 2011 325RLB has a GVWR of 11930 pounds and most likely has 5200 or 6000 pound axles. Putting on LT245/75R16E or LT235/85R16E is your best solution to limit future tire issues. On the low end the Firestones Transforce HT is a good choice. On the high end the Michelin XPS Rib or the Bridgestone Duravis R250 are steel ply carcass tires that are more of less bulletproof.
I ran RIB for 6.5 years and 40K+ miles(then sold them on CL for 200 bucks) and now have R250's which are about 50 buck less each.
It your axles are 33" or more center to center the 235's with fit. The 245's are about the same diameter as your ST235's.
Chris