One-piece construction for faster, smoother, more secure shifting13-tooth delta on all chainring pairs ensures precise shifting for any setup, as well as a less dramatic change in cadence during front shiftsX-Range gearing technology gives you more range and a smoother gear progression, so you`re always in the right gearDirect Mount48/35TAlloyBlack12spStandardUPC/EAN/GTIN: 710845887406