Road Gear

Technical FAQ: XTR pipe-spindle bottom brackets

How do I know if my XTR bottom bracket is serviceable?

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Regarding the DA BB question and your response to it not spinning very well and decreased rain performance, how can you tell if you have a first generation pipe billet BB?  Did the model number change when they improved it?

— Dick

Answer: A first generation DA or XTR pipe-spindle BB comes all apart and you have two sets of ball bearings and two sets of needle bearings that are loose (and that you can clean). A year or two later, the sealed cartridge appeared, which is not serviceable.