SRAM Rival 2x Chainring Kit - 2x12-Speed - 8-Bolt, Direct Mount - E1Stiff, strong chainrings form the backbone of SRAM's front shifting ever. Rival 2x chainrings are a light, elegant one piece construction so none of your effort goes to waste. A 13 tooth delta on all chainring pairs ensures precise shifting for any setup, as well as a less dramatic change in cadence during front shifts. One piece construction for faster, smoother, more secure shifting Crisp and accurate front shifts X Range gearing technology gives