SRAM's X-Sync Boost Direct Mount Chainring features tall teeth with alternating tooth profiles that hold the chain amazingly well and still provide space for mud to clear. - Chainring BCD: SRAM BB30 Direct Mount, SRAM GXP Direct Mount - Color: Black - Drivetrain Speeds: 10, 11 - Material: Aluminum - Ring Position/Type: Chain Retaining Single Ring - Offset: 3mm