I think there are two variables contributing to the different experiences. 1. Alignment ex: factory which will be in an acceptable range, but not necessarily fixed. 2. Driving behaviors. If I drove in standard all the time I think my inner rear tire wear would have been much less pronounced. Because I’m generally always on freeways over 65mph, and the car defaulting to low, I don’t think my rear tires stood a chance.I really do not understand how there can be so much variation in tire wear, on cars with pretty much fixed alignment values, assuming no accident damage, and similar driving habits. I would love to have the alignment values that Josephponline posted but not sure I am ready to invest in the modifications to achieve them.
Based on my first set of OEM tires, now replaced by a second set of OEM tires, I am not expecting to get much over 25k miles on the rears, outside tread will be fine at that point, inside will be down to steel cord, all with alignment in spec. I suspect the culprit is the non adjustable rear camber, which by definition is the same on all since it is fixed, yet some get twice the mileage on their tires. I would sacrifice some reduction in handling in order to have more even tire wear but don't think I can get there without adjustable links. I guess I either pay the price in more frequent tire replacement or in the purchase of adjustable links, but still does not answer the question of why are some vehicles not experiencing this.