Shimano part no.: Y1KF22000. 1 x Shimano SLX/DEORE Chainring for FC-M660/M617. Shimano SLX FC-M660 / Deore FC-M617 Chainring – Black. : SLX FC-M660 (3x9-speed) / Deore FC-M617 (2x10-speed). Shimano Deore FC-M617, FC-M617-B2, FC-M627, FC-M627-B (2x10-speed).
