Hey Folks, Just bought my first Duramax Dually yesterday. I'm interested in information about wheel spacers, like aluminum vs steel etc, and what size tires can i run with a leveling kit, and what size spacers i would need for those tires. I've seen some with 285/75/16, but not sure if I need 2" spacers or not. I'll be hauling some heavy loads with the truck too. Thanks for any info.