[BR3W CITY]

Thanks diesel.

Darryl,
from the outside of the tire to the inside of the fender, there is about 1.5 finger widths, so about 1". One side has a little more room becaue the PO trimmed the lip at one point.
The inside of the tire has almost 6-8" to the tub if I guessed, tub itself is a foot wide.
There is pretty much no chance of it bottoming out, the old bedside hangs about 1-1.5" into the tub where they overlapped and it was welded, even at that low point there is at least 5-7" room.

For reference, my tub is so tall that it hits the TOP bolt where the fenders bolt onto the bedside. Fully loaded with my brother in the back, there is at least 5" before you'd even come close to touching anything.