What rims fit 04 f250?

I know that its a 8x170 but what back spacing or offset? I was told not all 8x170 will fit my truck. Im looking at a set of eagle alloy 079's in black they are 18x9 with a offset -12mm and a BSM? of 4.466. Whats BSM?

Anybody with great knowledge that can help?

I am not sure what back spacing your looking for, but I believe BSM stands for back spacing measurement. But not sure what it is on an 04.