It should be like -10mm for a 35x12.5. or BS of at least 4.5. But +10 would nead spacers i believe. The 9 inch rim is going to be wide for a stock tire, factory is 7.5. Will work but i would not air that down. Check the back space metric i thought was like in the -10/-15 range. Or measure the inside face of the rim to the bead for backspace in inches. most all Jk run from 3.75-4.5 of backspace for any 12.5 wide tire will work.