I see. Did you look into using rotors from another manufacturer that were already in the 6x5.5 pattern? I know they make some big brake kits for the C10 that have rotors in the 13" range.Not an option, the pads would be hanging half off the edge of the 80 rotors. The other objective here was to get bigger rotors on the 80. 13.3” VS 12.25”.