Last time I was at 4 wheel parts, one of the guys told me if kept balanced and rotated on a regular basis they should hold up for a while. He's had guys come in with half tons and 3/4 tons with 40-50k on their trail graps and toyo open country mt. It all depends on how you drive and take care of them.
But info from other guys on the forum is always great, I'd like to hear some feedback as well