When shopping for a Shimano SLX M7100 Groupset, 1x12 one reads
⚠ For use with Shimano MICROSPLINE freehub bodies
Cassette NOT compatible with standard HG
(8,9,10 or 11 speed), XDR or XD freehubs
I'm confused about where the hub ends and the freehub begins. The hub is the "block with holes", where the spokes are attached.
The freehub is the "block with pawls", the ones producing the buzzing sound (loud or not), and the one enabling coasting.
I understand that the connection from cassette to microspline freehub is unique. The main cassette block and the individual cogs (if any) fit in exactly one way.
I also understand that microspline was required to accommodate a 10t smallest cog, which, oddly and in retrospect, seems like an invitation by Shimano for users to upgrade to SRAM Eagle 1x12 NX/GX (even if maybe SX is less than desirable) because although SRAM's smallest cog is still 10t, their cassettes fit on the old non-micro splines.
But what is the connection between freehub and hub? Can the buzzing, pawl-carrying freehub be replaced without replacing the hub (and ultimately rebuilding the wheel)?
If/when the pawls fail? Can the the "pawl-block" be replaced without rebuilding/replacing the wheel?
If you answer with a picture showing what remains after the microspline freehub is removed, that would be ideal.
As an aside
Shimano is careful about branding compatibility interfaces. Yet the very warning above refers to "standard HG". Is that really the best way to refer to non-micro splines? (I understand that hyperglide, or HG, itself refers to the ramps on cogs).