The big "S" has decided to join MBI, SRAM and SunRace Sturmey-Archer and move gear selection on three speed hubs inside the dropouts with their new SG-3R75:
Picture with optional/removable roller brake. That ~looks~ like a steel hub shell, rather than the aluminum hub shell the SG-3D55 has.
Exploded parts diagram.
This seems to be a new design with no internal parts shared with the existing SG-3R40 Nexus 3-speed. Like the Sturmey RSRF3, it uses a separate 'cassette' shift drum.
No information on ratios, OLD or when it might be available aftermarket in N.A.
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