• Thanks both. So it must be a RD-RX812? As it is 11sp and 11-42t slx cassette. Anyone who has experiences riding this and able to compare shifting to a R8000 rear mech on 11-32 cassette?

  • i have installed a RD-RX810 (the one for 2x group on my CX) with 6800 shifters and a 11-32 cassette and the shifting is great. very silent too ( the large jockey wheels seem to work wonders )

  • Can’t really tell TBH, the clutch sometime cause the derailleur to shift poorly putting too much friction on it after a while/wear and tear.

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