Mini-tubbed and leafs moved into the frame rails w/stock width a-body 8 3/4 here and my last 12" rims had 7 1/2" bs w/a bit of room to spare and now my 10`s are 6 1/2 bs and fit much better w/a 29x13.5 Hoosier QTP`s which put 11 1/4 inches on the ground.........