Hello I have a 2007 GMC Yukon 4x4 SLT with a CCM 2.5 in front and 1 inch rear leveling kit. I want to go with 285 65 18 Nitto Trail Grapplers Tires with 18X9 KMC XD Monster Rims. Can anybody recommend what offset and backspacing I should go with on the rims??? I have been told to go with a + 18 offset or a + 35 offset. I would like to have minimal rubbing and no damage to my vehicle if rocks are thrown out with the tires sticking out past the wheelwells. Thanks