I have found there is no text book suspension settings for me on the connie. I like mine stiff and fast. Fast as in quick responding. When its adjusted like that for me that equals a harsh ride and quick tire consumption. It also equates to best feel of the road and tight handling. I too have encountered the feathering of the tire when loaded down or 2up. Just had to learn to back it off a bit to conserve my equipment. You have to think 700 lb bike + 200-400lb occupants + 40 ish lbs luggage = a lot of forces on a bike that wants to drag hard parts. You want better tire wear your going to give up handling. There is no answer to this. I have ate a tire on a gap trip in 1700 miles before, i have also gotten 2 gap trips out of a tire before. I have just learned to be more conservative when I need to be.
this pic is that 1700 mile tire i spoke of..