05-09-2023, 04:52 PM
I was rather hoping that someone would have given the definitive '000' answer by now, but I will toss may hat in the ring. I think the '0', '00', '000' indicates the amount of play in the bearing. ie, the tolerance of the fit between the two parts, '000' being the 'best' fit. I remember Ray Walker having saved a '000' bearing for someone/thing specail, but it soon rumbled away like any other rear main. That's not to say that will happen to you, Dennis!