bear the bear
Is a real bear
Even though Shimano listed them, I am not sure if they were ever sold here in Australia @The Duckmeister might know.When I first looked into 12 speed, I needed a 8120 derailleur for the 45t. I got an 9120 to get me out of trouble. As it turned out 8100 is fine on 45 anyway. I’m wondering why we never got them?
I haven’t read your link yet but will check it out
The 8120-GS was designed for 2x12 and given most frames in the past 2 years no lower have routing for a front derailleur may be why it fizzled...
The 9120-GS was produced for the elite-level riders who can run 1x12 with a 45t rear and seems to be selling popular