Shimano Deore SM-CRM66 12s Chainring Direct mount. Narrow-wide. No drama. The Shimano Deore SM-CRM66 is a purpose-built direct mount chainring for FC-M6200 and MT620 cranksets. Made from steel for added strength and durability, it features Shimano's DYNAMIC CHAIN ENGAGEMENT+ tooth profile, a narrow-wide design that keeps your chain locked in place and shifting smoothly across 12 speeds. Available in 30T and 32T options to suit your terrain. Features Direct Mount design compatible with Shimano FC-M6200 and MT620 cranksets DYNAMIC CHAIN ENGAGEMENT+ technology with an optimized narrow-wide tooth profile for reliable chain retention and smooth, consistent shifting Steel construction for added strength and long-term durability Available in 30T or 32T to match your riding style and terrain SPECIFICATIONSChainring Mount Direct Mount Crankset Compatibility Shimano FC-M6200, MT620Chain Compatibility HG 12-Speed Gear Speeds1x12Tooth Options30T, 32TMaterial Steel | Shimano | Deore Sm-Crm66 12S Chainring 32T | Aluminum