Ok I got a set of BFG Rugged Trail on the wifes yota now we were using the Dunlop Grandtrek and were replacing them once a year after about 35K,yes I had the alinement checked twice by the dealership and it wasnt the truck just the tires.
I two in two years is a joke and BFG are very good on dirt,gravel,snow and mud they have only spun on my SD twice with me not doing it delibrately even drving them on flooded roads at 35mph leaving a 12 foot rooster tail they dug in.