I have heard its the wheel , heard the wheel stamping is getting worn down slightly from use and the center hub hole is just slightly small.
I had a guy call me , not one of my customers , and ask for any ideas on what to do. He ended up using a die grinder and clearing all the powdercoat and just a bit of the steel to get it to slide on the front disc brake hub. He had orginal rotors. This was a small ( four inch )
bolt pattern wheel.....

Frank