Shimano Alivio 9-speed Chainring FC-M4000/M4050. 96 / 64mm (FC-M4000/M4050). Group: Alivio M4000/M4050 3x9-speed / M4050-B2 2x9-speed. 30T Shimano Part Number: Y1PL98040. 36T Shimano Part Number: Y1WR98010 Also fits FC-M3000 2x9 speed.
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