I had the same problem with an 04 G3.Had the white spoke wheels from the factory.Started wearing tires real bad on the inside so I changed the wheels to a more solid aluminum wheel & 2 new trailer rated tires.Problem solved. I gave the 2 white spoke wheels to a hunting buddy to put on another trailer & they are still wearing out tires.A tire tech told me those white spoke wheels over a period of time would become fatigued and flex enough to cause that problem.He doesn't sell the spoke wheels at his store because of that issue.No abnormal tire wear going on 2 years now.Happy Happy Happy.