Sram: The wider stance of the arms and chainrings provides clearance for extra wide tires, giving you the option to explore new, more challenging routes.FEATURESX-Range™ gearing technology gives you more range and a smoother gear progression, so you’re always in the right gearCrisp and accurate front shiftsWide chainline crankset for bikes with up to 700x45c or 27.5x2.1” tire widths (43/30 chainrings only)DUB™ bottom bracket adds durability and simplicityLonger DUB crank spindle accommodates both Road and MTB width frame bottom bracket standards for unmatched cross-compatibility across brandsRequires wide front derailleur SPECIFICATIONSSpeeds: 12BB Compatibility: All SRAM Road WIDE DUB BBsChainring Size: 43/30TCrank arm length: 160mm, 165mm, 170mm, 172.5mm, 175mmChainline: 47.5mmBB Spindle Interface: DUBChainring material: AluminumGuard: No GuardBolt Circle Diameter (BCD): 94 BCDCrank arm material: AluminumColor (Crank arm): Black