I just bought the X2 ball joints and had read up to the bump-steer kit recommendation which I got. Came back after and seen required minimum are 18" wheels. I got 17s. Did I screw up?
I have never heard of having to use 18's with that setup. I think if you put 17's on it with a good alignment, then you should be just fine. Caster camber plates would help also.