I actually have a 21" front wheel and rotor from a 2004 sportster that I am going to try an fit up. I don't whether I want to machine a new front axle to fit the smaller harley hub or wait until I replace the front end with the 41mm harley downtubes and lowers. I am still riding due to the unseasonable good weather we are having here in the NE. I usually tear the bike down during the winters. At least thats how its been the past two winters. The bike is usually just a frame and motor sitting in a jig the whole winter
