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dmorgan: your links didn't load.
Rear camber is absolutely adjustable on a stock 996/997.
A few things to consider:
Any lowering of the vehicle, as the OP has done, changes the suspension geometry drastically! There are PROPER ways to lowering a 911, and simply slamming it isn't the "proper" way (IE: his tire wear). Keep in mind the following is for a stock 996/997:
Tire wear on the inside edge happens due to negative camber. The car is designed to have negative camber. Negative camber increases traction in corners. Highway queens tend to show more wear on the inside edge than cars that are driven.
Depending on driving habits- 8k-12k is normal rear tire life on a 996/997. Some drivers can stretch it with a NON-factory alignment specification to 18k. Some drivers get 2k miles with lots of track use. So- overall tire life can be 2k-18k depending on your driving.
That being said- I have set up GT3s with almost 2 degrees negative camber. After track use, they come out smooth- worn straight across. Street 996/997 should have about -1.3 degrees of camber. The way the car is driven plays a huge part in how the tire wears. If you aren't driving the car hard, you predominantly ride on the inside edge. That is by the design of the car. Why? because the car is meant to be driven!
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