definatly on the frame. I had 35" on my stock harley 20's and they rubbed on the frame at a full turn. but small wheel spacers will fix that. you also might have to trim a little inner fender plastic, but I cant say for sure. Just put them on. They will work one way or another. The guys installing big tires always make a big deal out of it. Im sure you will be happy with them and plus they will look cool.