Unique chainring shape results in a lighter weight, stiffer, more durable cranksetWith tight 13-tooth gaps between chainrings paired to wide-range cassettes, riders get more range while shifting less frequently and staying in the big ring longerX-Range gearing technology gives you more range and a smoother gear progression, so youre always in the right gearCarbon fiber crankarms for light weight and stiffness50/37T, 48/35T and 46/33T chainring combos availableDUB bottom bracket adds durability and simplicityCan be upgraded to a power meter165x46/33DUBBLK/IRDirect mount2x12UPC/EAN/GTIN: 710845892073