SRAM 48/35T DM RIVAL E1 BLACK (P)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 X Range gearing technology gives you more range and a smoother gear progression, so youre always in the right gear One piece construction for faster, smoother, more secure shifting Crisp and accurate front