Originally Posted by
Andeh
I-9 responded and agreed that it seems like excessively short lifespan, and offered to send a new set of endcaps, axle, and bearings. They said the most likely cause would be the hub's tolerance stack (set by axle shaft and freehub spacer). And if this was too short, the hub would get overloaded.
This does seem plausible. The hub was originally set up for MS, but pretty quickly converted to XD. I replaced the endcaps along with the freehub when I converted it, but maybe I somehow got the endcaps mixed up and have been running the wrong spacer. The front bearings always seem to be fine.