Unreasonable toe settings will wear out tires rapidly, however camber does not wear out tires. What is the theory behind that camber does not wear out tires when the inside are prone to more pressure and the outside tires aren't.

I just want to learn why and the physics on why camber doesn't affect tire wear. Haven't seen any reason on ht.com as to why, but I've read time and time over again that it doesn't affect it.

 

Well here is some thing to think about the positioning of toe in/out on a car to a straight line. Now when you move forward although the tires don't point straight ahead in the direction that you are going you still move forward. Since the direction the of movement and the tires are not in complete unison you are to a certain extent you are draging the tires in the direction you are moving. This is a basic idea of why it happens.

 

Toe will wear on tires but so does camber, just to a somewhat slower degree. Ask most any lowered BMW owner about how his rear tires wear.

It is possible to have evenly worn tires and a fair amount of negative camber if the camber is set to the point that your regular usage of the car ends up rolling the load side tires into an upright situation. Many years ago when I worked at a tire store and paid excessive attention to my tires and alignment (I could get work done every few weeks afterhours for the cost of a few beers), I had an Omni GLH Turbo on stock springs and 50 series tires with -1.75-2.0 degrees of camber and dead perfect wear to the point that I could wear the 50 series well past any semblence of treat pattern and have no edge wear. This was an extremely rare situation where the roll stiffness, regualr body roll the car saw and the alignment all lined up. Had I used stiffer springs, driven less aggressively, or had different camber then all of the starts would not have aligned for this perfect wear. I have never been able to repeat this situation in the last 15 years either.

These days as stiffer lower springs are more common as are lower cars and wider street tires as well combined with more sane cornering forces, camber wear alone on tires is more common if the toe is set right. if the toe gets off, it will eat the tires faster so camber wear is going to be less noticable.