This stiff and strong chainring set forms the basis for extremely precise shifting performance. The lightweight one-piece construction ensures efficient power transfer and smooth, fast shifting. Thanks to a 13-tooth difference between the two chainrings, every front shift is smooth, with minimal cadence change. The X-Range technology also guarantees a wide range and smooth transitions.Crisp and accurate front shiftingOne-piece construction for faster, smoother, and more secure shiftingX-Range technology also guarantees a wide range and smooth transitionsSram Article Number: Retail Packaging: Yes