Originally Posted by statikuz

Yes, the less backspacing (i.e. the more negative offset) will push the wheels out further.

If you have a 9" wheel with 4.5" backspacing, then the offset would be 0. As the backspacing increases, the mounting pad moves to the outboard side of the wheel and the offset increases as well. The stock Ford rims' mounting pad is closer to the outside of the wheel, ergo the +44mm offset. If you have backspacing that's less than half the wheel width, the offset is negative, that is, the mounting pad is more towards the inside of the wheel.

My wheels have a -12 offset, so they stick out a little bit:

Originally Posted by F_ast

That is strang!!! I have a -12mm offset on my 09 with a 305 tire and mine stick out way more... Yours look more like a +18 OS