I'm looking for a very silent hub. Upon searching, I came across with Onyx hubs which definitely has no sound. I really like it, but my budget doesn't. So I've searched a little more and found Shimano's new 12 speed XTR hub with Scylene tech which cost half the price compared with Onyx. My problem is, it's 12 speed with new Microspline freehub body. I have an old XTR 11 speed setup.
So there lies my question, can I fit an 11 speed cassette to a XTR 12 speed hub?
I know there's a spacer but I only see an upgrade from lower speed to higher like 11 speed to 12 speed not downgrade 12 to 11.