No inconvenience here, def worth asking about. I think your case is a little
unique, so it may have thrown a few of us off. But as MY1PATH mentioned, the ring thickness is just to account for minor deviations. The FSM does provide instructions on what to measure and how to pick the size, I’m pretty sure. But again, that applies to the ring inside the wheel hub. The part that pulled out on yours probably just uses a single size of ring, and the thickness of it probably isn’t relevant. Still, a new CV renders that discussion moot.