Robnbell, welcome to the HDTimeline forum. With the new tire, check if it is the same OEM size and type tire as the Dunlop that was installed. A new tire has more "meat" in the center of the tread, and as your ride ages, the suspension sacks down a bit. May want to adjust the preload up a notch or two (to the max if you ride two up often). And the likely thing you are rubbing is the inner fender, where there is a metal wire loom protecting the taillight/license plate wiring. It is easier to find this with a bike lift to get the tire away from the fixed fender by allowing the swingarm and wheel to drop to their "lowest position".