New Michelin LTX M/S2 Dually clearance issue??

I used to have a 2006 Chevrolet 3500 dually. When I changed tires I too was concerned about the spacing. I purchased a set of Fred's spacers. Because they are machined with precision and have the proper mating surfaces to allow them to work properly as hub centric mounting surfaces, I never had any problems. Great Quality product- worth the cost.