X-SYNC wide-tooth, narrow-tooth chainring technology provides maximum chain controlX-Range gearing technology gives you more range and a smoother gear progression, so youre always in the right gearImproved aerodynamics for time trial and triathlonLaser-etched chainring finish is more durableAvailable in 48T and 50TDirect Mount48TBlack12spNarrow/WideUPC/EAN/GTIN: 710845899652