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shifts fine without a wheel in it. odd that the di2 derailleur sort of "hangs" vs a normal mech which springs back on itself. is that normal?
OK so it must be something to do with the b screw. back it off completely and it shifts super smoothly on the smallest 5. it can go up to the largest (34t) but really struggles because the jockey wheel catches on the cassette.... there seems to be a happy medium where it all works ok but shifting isn't super smooth. clearly needs more tinkering - had no idea b screw had such an impact
swedeee
@Dammit
If you take the wheel out and shift what does it do?