Hope Retainer Chainring On Retainer The Hope 104BCD Retainer Chainring has a narrow/wide tooth configuration designed for 1x10, 1x11, 1x12 drivetrains, including SRAM T-Type and Shimano HG+ set-ups, without the need for a chain guide. It features improved mud-shedding capability and chain retention, enhanced performance with extreme chain angles on modern 1x drivetrains, a leg design that provides improved strength and stiffness, and a quieter drivetrain with reduced drag. Features Designed to be compatible with 9, 10, 11, and 12-speed drivetrains, including SRAM T-Type and Shimano HG+Improved mud shedding capability and chain retention Better performance with extreme chain angles on modern 1x drivetrains CNC-machined 7075-T6 aluminum provides the perfect blend of lightweight and strength SPECIFICATIONSDrive Train Speed9, 10, 11, 12Tooth Count32, 34, 36t Bolt Center Diameter104 BCDMaterial7075-T6 Aluminum Intended Use Mountain Weight39g (34T) | Hope Technology | Retainer Chainring 32T 104 Bcd R22 Black | Aluminum