Shimano FC-R9100 Chainring 53T-MW for 53-39TRedesign the gear teeth profile to fit a wider gear pitch Rider tuned gearing options Exclusive for Dura Ace R9100 cranksets 11 speed SIS compatible Outer chainrings are hollow forged and machined with integrated (blind) threads for optimized strength to weight Speed: 2x11 speed BCD: 110mm 4 Arm Asymmetrical
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