From what I have heard, the production bar will be "soft". I was using the soft setting with the winter tires on. I threw the LTZ wheels on and switched to the hard setting at the same time. What little I have done so far sure does seem nice. Hoping for decent weather tomorrow.
I can clearthe one round about at about 35 MPH with the winter tires, BNR bar (soft) and DDM brace. Might be able to test out the 17s, BNR firm, ddm, and zzp tomorrow.