Road Gear

Technical FAQ: XTR pipe-spindle bottom brackets

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

Lennard,

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.
-Lennard