Why front derailleur is rubbing crank arm? Last week I realized that when I am on the big ring, crank arm touches front derailleur slightly. If I try to fix that with limit screw, then chain does the same (if I am on rear smallest gear). So it seems that there is not enough space between chain and crank arm for my front derailleur and I can't understand why.

My front derailleur is 1.5-2mm above from big ring and it is quite parallel to it. There is no bent or damage on front derailleur.

My components are;


Ultegra r8000 front and rear derailleur
Cassette 11-32T (shimano 105)
Ultegra chain
Ultegra r8000 crank set (52-36)
Bike is Canyon Endurace Al (components were ultegra 6800 few months ago)


So if you have any idea about how to fix it or what is the problem here I would like to learn.

By the way I have right arm only Stages Gen 3 power meter on crankset, but it seems irrelevant to me.






FD out most
FD outmost 2
Best adjustment possible
Pic 1 shows that the outside plate of the FD is unnecessarily far out. It should just be a hair away from the chain when in big front and rear small. You'll have to adjust the limit screw quarter turn by quarter turn, so that the chain climbs on the big ring and does not rub against the outer plate. Also the outer plate should be parallel to the big ring.

On some bikes this adjustment can be a fiddly process requiring lots of patience. Also on YouTube check the videos from several pages like GCN or Park Tool.