Dunlop tires have been cupping front and back . put two sets on and the same thing. dealer does nothing, dunlop does nothing, Harley does nothing, each blame the other. last one I put on was the front and less then 1000 miles and they are starting. Rear is up to be changed now so my question is????????????? has anyone put a car tire on the back of there FXDF or dyna and what one did you use and how did it go? they are putting the run flat tires from the Cooper mini on some bikes and they like them a lot .