SRAM 1x12-Speed X-Sync Chainring, 107BCD - SRAM's X-Sync Road Chainrings are designed for provide maximum control when used with AXS road cranksets.Can be installed with a single tool, making gearing changes a breezeChainring bolts not includedLaser-etched chainring finish is more durableX-Range gearing technology gives you more range and a smoother gear progression, so you?re always in the right gearX-SYNC wide-tooth, narrow-tooth chainring technology provides maximum chain control