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Originally Posted by RandallNeighbour
One inch really does make a lot of difference in the camber adjustments or lack thereof when you lower the suspension... making rapid rear tire wear on a boxster even worse.
I decided to put on adjustable toe links in the back due to the math. They were only the price of one rear tire one time. Not two rear tires more frequently and repeatedly.
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The Boxster's rear suspension consists of a lateral link, a longitudinal link, a toe link, and the strut. Porsche designed the car so that as the suspension compresses, the wheels toe in to enhance stability. When you lower the car, not only does the camber increase, but the rear toe goes more negative. There isn't much camber adjustment and there is no stock toe adjustment. The adjustable links, like Randall's, help to reset the toe so that there isn't excessive tire scrubbing just going straight.
Lowering the car still gives alot of camber even with the adjustable toe links, which is good for stability, but not good for tire wear. The RoW suspension lowers the rear of the Boxster 10mm, Porsche has alignment specs for that that are achieve-able. Lowering the car more makes the alignment specs impossible to hit without more adjustable parts.