I know part of this thread is older but I want to add some info I found on mine. I have a 2022 LT with the 18 in continentals that I just got in May. I took it in for its first oil change last week and my dealer has the Hunter machine you drive across when entering the service area. The report on mine showed the rear was out of spec, front showed ok. I asked how that could be with this being a new car. I was told that alot of new cars come from the factory mis-aligned or they can get jacked up when they are loaded onto the transports and ratcheted down. So for those that are having rear tire wear get the alignment checked.