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This Shimano Deore chain-ring is compatible with FC-M510, FC-M540 and other cranks. It can be used in a 3x9-speed system with 22-32-44 and 26-36-48 teeth gradations. The SG-X technology provides smooth and fast operation. The smaller chain-rings (up to 36 teeth) are made of steel, the larger ones of aluminium.