SHIMANO LX-M572/1/0 9sp chainring, 64BCD x 22t - sil ARM x BCD: 4x64mmChainring BCD: 64mmChainring BCD: 64mmChainring Speeds: 9spChainrings Material: AluminumComponent Color: SilverMax Teeth: 22tModel Compatibility: LX-M572/1/0