Hope Spiderless Direct Mount Retainer chainrings are specifically designed for use with Hope cranksets and have a narrow/wide tooth configuration designed for 1x10, 1x11 and 1x12 speed setups without the need of a chain guide.Designed to be compatible with 9, 10, 11 and 12-Speed drivetrains, including SRAM T-Type and HG+. Improved mud shedding capability and chain retention. Better performance with extreme chain angles on modern 1x drivetrains. Leg design provides improved strength and stiffness. CNC machined 7075-T6 aluminium provides the perfect blend of lightweight and strength. Offset to give perfect chainline. Quieter drivetrain and reduced drag. Weight: 61 g. Item Specifications: Tooth Count, 30, Drivetrain Speeds, 9, Drivetrain Speeds, 10, Drivetrain Speeds, 11, Drivetrain.