American force 12 inch wide wheels have a little less - offset then most other wheel brands afs are -40 most others are -44. The with of your tire will also make a difference on how much they stick out. Those 12.50 appear to be a little bit stretched and don't stick ou as much the opposite goes for the 13.50. Hope that helps a bit. I run the set up mentioned 22x12 American forces and 325/50r22 toyo at 2s except with a 2.5 inch lift you don't have to trim much and I would recommend it to any one. Good family hight to. As they said 24x12 37s and a 4 inch Lift won't work unless you want to cut some major stuff. My uncle runs 24x12 afs and 37s on an 8 inch lift and still scrubs on the front valence. Unless you do any thing stupid in it your probably safer that high his truck rides good.
Hope this helps.