![Load image into Gallery viewer, Dura Ace FC-R9100](http://racktrendz.com/cdn/shop/files/350690-04_1_400x@2x.jpg?v=1715713409)
![Load image into Gallery viewer, Dura Ace FC-R9100](http://racktrendz.com/cdn/shop/files/350690-05_1_400x@2x.jpg?v=1715713409)
![Load image into Gallery viewer, Dura Ace FC-R9100](http://racktrendz.com/cdn/shop/files/350690-06_1_400x@2x.jpg?v=1715713410)
• Optimum power transfer
• Maintains high rigidity and reduces weight (-7g)
• Best balance for light weight and efficiency
• 4-arm construction crankset
• New design crank arm, adapted for race specific disc brake system
• Redesigned gear teeth profile to fit wider chain angles
• Compatible with shorter chainstays (410mm) on frames with 135mm or 142mm spacing