Sram Red Axs, Crankset, Speed: 12, Spindle: 28.99Mm, Bcd: Direct Mount, 48/35, Dub, 165Mm, Black, Road* X Range gearing technology gives you more range and a smoother gear progression, so youre always in the right gear* Improved front shifting performance for crisp and accurate front shifts* Unique chainring design results in a lighter weight, stiffer, more durable crankset* DUB bottom bracket adds durability and simplicity* Can be upgraded to a power meter