285/40/18 Goodyear Eagle F1's

Checkpoint #1
2 degrees of negative camber, 35 lbs of pressure, 3k miles. Driving behavior is all city, weekly spirited curvy driving.

Results: Front tires, 25% more inside tire wear. Rear tires, 40% center tire wear, and 25% overall more tire wear.

My conclusion: -2 degrees of negative camber is tolerable for city driving. Our rear tires wear out almost twice as fast. 35 lbs. of pressure is a definite over-inflation.

Checkpoint #2
2 degrees of negative camber, 28 lbs of pressure, 2.5k miles. All highway driving, high speeds.
Results: Front tires hate the negative camber, 60% more inside tire wear with less air and highway driving. The rear tires like the less pressure of 28 lbs. for tire wear and no burnouts.

What's next?
Back to 35 psi up front, the turns and lateral g's are better, the camber is less pronounced with more center tire wear. Remain at 28 psi out back. The car turns better with less rear pressure, oversteer and will produce less center tire wear.

Give me your thoughts. Where is my logic flawed?

 

I think what you are seeing is what is to be expected with -2 degrees camber, well outside specs, and staggered tire set up that you cannot rotate other than side to side.

Rear tires on a RWD vehicle that do not get rotated with aggressive driving will wear down the center.
Same goes on a FWD car with the front tires.

Here is one of my front tires just before trashing it, ran at -1.4 degrees camber.