Oh my bad then.....I'd thought for some reason that the K's had upsized rotors compared to the C's. My c1500 with american racing outlaw-II's has about....ummm, I think ~1" between backing plate and inner wheel "drum" area.....I haven't a clue wtf they call that part of the wheel. How much gap does your AR wheels have in that area? I didn't think they'd actually rub considering there would only be 1/2" less space, just haven't seen any that I know of. In the last few years, tire companies are making more options available in 16+ than in 15, so you don't see many 4x4's with 15's, except some yota's and other ***-crap.