SRAM RIVAL D1 175x48/35 DUB NoBB BLACKPolished aluminum crankarms in a wide range of lengths and the DUB bottom bracket system mean the Rival crankset will keep spinning, no matter what A tight and consistent 13 tooth gap between chainrings makes for accurate and dependable shifting X Range gearing technology gives you more range and a smoother gear progression, so youre always in the right gear DUB bottom bracket adds durability, simplicity, and virtually universal frame compatibility