I had pretty much the same issue. the 37-14.50 mud grapplers hit on full turn. I have 20 inch wheels so my choices were somewhat limted. BFG makes a 37-12.50-20 but the price is out of sight. I ended up with 35 - 12.50 Firestones and although I don't think it looks as good, it steers much better and that god awful noise the Mud grapplers were making is finally gone
I'm running AT's now too.... I definitely don't miss that MT's wa,waa,wa,waa,wa,waa, wa,waa,wa,waa,wa,waa,wa,waa,wa,waa,wa,waa,wa,waa,wa,waa,wa,waa, wa,waa,wa,waa,wa,waa, wa,waa,wa,waa,wa,waa!