SRAM Rival D1 Road Crankset DUB - 48-35 - 172.5mm. Designed to handle whatever you can throw at it. Polished aluminium 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. Features X-Range gearing technology for more range and smoother gear progression, crisp and accurate front shifts, and a DUB bottom bracket for durability, simplicity, and virtually universal frame compatibility. Chainring material is Aluminum and chainline is 45.0mm.