Nope, same CCSB Ram 2500 6.7 cummins, G56 just 4 years in age difference. rolling across the scales, there was less than 200lbs difference in weight. same tire size, same load rating, same tire pressures. The michelins have a noticeable narrower treadwidth vs traditional AT's. IMO(and everyone has one) these tires are made for highway use with the occasional gravel road. the sidewalls already have cuts and chunks missing, simply from concrete curbs from parallel parking and gravel roads.WyoCherokee did the trucks have any difference in weight or gear? I've had exactly the opposite experience with them. Not saying you didnt, just wondering if weight could have explained some of the difference. But maybe some other difference explains it- footprint of your old tires vs footprint of the Michelin's or something else. Just odd that it's so different for some.