...the White Industries bottom bracket requires a lock ring ? I've never seen a sealed unit BB that needs a lockring on the non drive side. I guess maybe I don't know what we're talking about any more. The whole deal with using a spacer under the drive side lip on a sealed unit is pretty much based on the idea that the non drive side cup that holds the sealed unit in place just threads on into the BB until the tapered lip butts up against the cartridge and holds the thing in place.