Originally Posted by Casper

For the rears the front one adjusts antisquat and the rear ones control rear toe in.

0 for the front one is 2deg of antisquat (stock setting) You can increase or decrease the amount of antisquat from there. WE are running 1's up for max antisquat these days.

Rear toe 0's are 3 deg of toe which is stock. Most run stock but Aaron has played with a little less toe (.5's in) for ~2.5 deg of toe to unlock the rear a little for certain conditions.

Front we run 0's which is the stock setting. Techincally you could effect roll center but moving the inserts the same moving the pivot point of the arms up or down relative to the chassis but as the little insert that comes with them shows it is really for adjusting the kick angle of the from arms. This not only effets the kick but overall caster of the truck. Again we have tested other settings but like the stock setting of 0's all around best.