I was not planning of deleting the hicas but my tire choice could force the issue. I would like to run 285's in the rear and I know its going to be tight. I have not mocked it up yet but I'm concerned about rubbing at the rear steer limits. I have not seen tire size listed as a reason to ditch the hicas. Typically the rational is for weight, simplicity, predictability and of course "who needs it?".