The biggest difference in the new 5800-series front mechanism is a longer link arm and a lower trim position. The latter helps to minimize the possibility of chain drop. New springs have also been added for faster, more reliable shifting both up and down.
For 11 speed drivetrains
Compatible chain: HG-EV 11-speed/ HG-X11
Chain line: 43.5mm
Chain stay angle: 61-66 degree
Top gear teeth: 46-53T
Total capacity: 16T
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