Ultra-light hollow carbon fiber crankarms - 29 g lighter than the previous generationOne-piece 2x chainring results in a lighter weight, stiffer, more durable cranksetX-Range gearing technology gives you more range and a smoother gear progression, so youre always in the right gear50/37T, 48/35T and 46/33T chainring combos availableDUB bottom bracket adds durability and simplicityCan be upgraded to a power meter170x46/33DUBBLK/SILDirect Mount2x12UPC/EAN/GTIN: 710845898716