• Hollow aluminum crank arms
• Compatible with short chainstays (410mm) on frames with 135mm or 142mm spacing
• Compatible only with FD-R9100/FD-R8000/FD-R7000/FD-5801 front derailleurs
• Chain Compatibility: HG-EV 11/HG-X 11
• Bottom Bracket: Not included - SM-BBR60/SM-BB72-41B
• 713g (50-34T), 743g (52-36T), 758g (53-39T)