What is the theory on how they work?

 

basicly it relocated the mounting point of the lower control arm, so that the rear tires are driving into the ground instead of them trying to lift up. the are especialy needed on lowered cars, when you lower the car the angle changed, so the relocation brackets help correct the change in the angle.

of course that is just brushing the surface on how it works, do a search , there is alot of good info on exactly what geomity is optimal for diffrent uses and why.

 

check the Spohn web site...they have a littel description on there about how they work.

And, like he said, if you do a search you will find more info..I remember doing some research on here not too long ago and finding some good info.

-Brian