Kyle do yourself a favor and stay away from a lockright in the rear of your rig. They are clanking banging unloading sunzubiotches! I love my lockright in the front of my truck, I put one in the rear of a buddies truck at the same time as my install. I told him to weld the rear and put the locker in the front but he was like you, he was concerned with tire wear etc. 3 days later he called me to ask when I could help him put it in the front and weld the rear.
But it all comes down to you, put the locker in the rear and drive it for a few days. If you can live with it great if not it will work great in the front.
