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@Alex_B
I'm not having a great time installing a GRX822 rear derailleur.
Using an 11-51t 11speed cassette and following a YouTube hack, that assures me that the 12speed rear derailleur will play nicely with 11speed shifters, I'm not getting good shifting performance.
I cannot find an installation manual for this derailleur anywhere and am having trouble setting the b-screw position to place the cage at the correct height relative to the cassette. Does it fit with a standard chain, or do you need an extra long chain? It's currently sitting a bit low. It'll shift to the 51t sprocket, but is quite reluctant to shift to the 11t.
I'm using a Deore XT chain, 36t chainring 11-51t cassette, so was expecting the chain length to be correct.
Any tips would be welcome.