When your "DARK-SIDDING" remember to keep your tire pressure up. My last dark-ie ripped a cord on the Dragon couse I let the pressure down to hug the curves better.
But it was one of the quickest bikes of the day while it held !
I'm running the Commander II now (S-40) and have about 10,000 miles on the rear now and its only half gone ! That's why I went Dark to begin with , I think Michelin got the message about long tire life.
My Sportster has a Commander II also ... 6,000 miles and still looks new-ish.