at the very edge of the rotor, it has about .03" off when you spin it 360 degrees. i dont know if im being anal, or if thats ok. i tried tightening the bolt that holds the rotor to the spindle but it only makes the rotor harder to turn. all the parts are new, including both inside and outside bearings, 2" drop spindles, and rotor. here is a picture to give you a better idea about what im talking about. thanx