Shimano ChainringsA-Type, for use with 42 tooth A-type inner chainringHollowglide hollow chainring construction for rigidity and light weightDesigned for use with 10-Speed asymmetrical Shimano road chains: CN-7901, CN-6711 & CN-5700Item SpecificationsColorSilver/BlackMaterialAluminumTeeth53teethBolt Pattern5-BoltChainring BCD130mmRing PositionOuterChain CompatibilityShimano 10,SRAM 10Defined ColorSilver