Shimano Dura-Ace FC-R9200 12-Speed Chainring - 52t, Asymmetric 110 BCD, Black, NHShimano Dura Ace FC R9200 chainrings are constructed with high quality aluminum and are compatible with FC R9200 and FC 9200 P 2x 12 speed cranksets. Aluminum with anodized finish provides durability and light weight Hollowglide technology provides high rigidity and cuts down on weight while maintaining strength Offers better power transfer and quicker, more precise front shifting 52t outer chainring is for use with 36t inner chainring Asymmetric 110
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