I put my first set of Michelins on my super glide last year got about half tread left after 12,000 miles usually got about 10,000 out of the Dunlop on the rear
My bagger gets Dunlops, get really good mileage out of them. My sporty gets Avons, not quite the life span, but they're fun in the twisties:newsmile108:
Just traded off my trusty Sporty for an FXDF. Have the stock "knobbies" on the new bike, ran Metezler on the rear and Dunlop 404s on the front on the XL.