Sram`s lightest, stiffest and most durable chainringOne-piece construction for faster, smoother, more secure shiftingX-Range gearing technology gives you more range and a smoother gear progression, so youre always in the right gearA 13-tooth delta on all chainring pairs ensures precise shifting for any setup, as well as a less dramatic change in cadence during front shiftsDirect Mount48/35TAlloyBlack/Silver12spStandardUPC/EAN/GTIN: 710845899577