SRAM Force X-Sync Chainring SRAM X-Sync chainrings feature tall teeth with alternating tooth profiles that hold the chain amazingly well and still provide space for mud to clear. Features Full CNC AL rings SPECIFICATIONSTooth Count48Ring Position/Type Chain Retaining Single Ring Drivetrain Speeds10 , 11Chainring BCD110MFG#11. 6218. 019. 000 | Sram | Force X-Sync Chainring 48T 110Mm Bcd | Aluminum