I made the mistake of using the Ford recommended inflation pressure on the fronts--had a lot of edge wear in the first 30k. I swapped the fronts to the inside rears, began running 100psi in the fronts, and now no wear. Had the alignment checked, nothing out of spec, so I believe the air pressure caused the wear on the fronts.
Now at 62K and all it well, expect to still hit 90k before I change.
2016 Tiffin 40 QBH
2015 38RSSA, traded
2005 TK3 #1869, 10 yrs of memories,
2017 F450 KR--one more Ford is it
2009 F450 4x4-died; 2010 F450-retired