2

I have a Canyon Ultimate CF SL.

I have installed an R8000 Ultegra front derailleur. I am finding that even when the limit screw is dialed right out that when in the little-big combo (little front, big rear) the chain is still scuffing on the inside edge of the derailleur cage.

I have tried dialing out the lower limit screw, ensuring there is no cable tension, and ensuring it's properly aligned with the chainset. The chainset is 6800 50-34.

Any ideas what is going on and how I can rectify this issue?

  • Loosen the clamp on the downtube and twist the derailer slightly. Often it has to be a hair non-parallel to work in such extreme cases. – Daniel R Hicks Jan 14 at 23:07
  • Can you post a photo? Cam you see any FD parts touching the frame, like spring or inner cage plate? – Klaster_1 Jan 15 at 2:38
3

Amateur hour. Turns out my K-Edge chain catcher was actually blocking the derailler from moving into the lower position. It looks like this chain catcher is not compatible without modification for use with R8000.

  • Excellent finding - thank you for sharing that. Consider trimming the chain catcher so the front mech can move a bit further? – Criggie Jan 15 at 2:15

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