I just picked up this lil gem last week for $40

(Not that price isn't a typo)
I had a New 2" 7K lb Bulldog hitch welded on Friday (Had a 1 7/8)
My question is, what kind of tires should I run on it to handle abuse?
(BTW, It also has the Factory type Overloads under it also)
Using a set of 15x6 factory steelies (Not installed yet)