I've put about 4000 miles on my truck since the SFA 1-ton swap and the passenger side front tire is almost wore out. It is only wearing on the outside half of the tire, the inside half looks almost new. The driver side tire looks fine though. I pulled the tires off last night and checked the toe by measuring from brake rotor to rotor and it is toed in about 1/8". I got the front end on jack stands and the axle tube sits pretty close to level so I put an angle finder on the rotor and its sitting pretty much straight up and down, 90º. What else should I be checking?? The truck drove fairly straight and didn't pull to either side. The D60 was totally rebuilt before I put it in with new upper and lower kingpins/bearings, although I didn't actually do them. It does have crossover steering with a 3" block under the arm and a WTO ram mounted on the passenger side. My truck weighs about 5800lbs and I ran the 39.5 TSl at about 20 psi. Any advice or ideas are appreciated, 39.5's are too expensive to burn up in 4000 miles!