96 f350 dually wheels
 

Just came into possession of my first dually truck and I'm looking into wheels and tires and I keep seeing dually trucks running normal 20x12s with -44 offset in the front and rear and I'm wondering how they're achieving this is it just with spacers or what? I like the wide selection of normal wheels over dually wheels
https://cimg9.ibsrv.net/gimg/www.tru...76f22952c0.jpg