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. Jan 14, 2019 at 23:07
  • 1
    Can you post a photo? Cam you see any FD parts touching the frame, like spring or inner cage plate? Jan 15, 2019 at 2:38

1 Answer 1


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, 2019 at 2:15

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.