Well if they are the same config. as the stock hub, and they lower the center axles closer to the st03 ball, wouldn't that effect the CG
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I doubt it'd affect the CG. It's probably targeted at roll center. The height of the axle on the outside is going to be defined by the tire. So reducing the distance from the axle to the lower ball would effectively raise the lower ball, giving you a more angled lower arm, and a lower roll center.
-Mike