18" rims for 2002 Superduty 8on 170mm

They do have a positive offset. I ran a 285/75 r 18 tire (35"x11") and they just barely hit the leaf spring. I put a 2" wheel spacers when I bought new wider tires (almost 13" wide) and they never touched the springs.

I'll take some pics tomorrow in the day light.
 
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