Looking for a few answers. Picked up a 2016 Kodiak700 and want to add some different wheels but want to keep the tires it came with. Found some wheels I like but I don't know enough about sizing to go ahead and order them. Stock tires (per the manual) are AT25x8-12 for the fronts and AT25x10-12 for the rears. The size wheel being recommended are 12-7 5.0+2.0. I don't understand the numbers? I would appreciate some input.