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The crank is the very centre of SRAM s X-Range gearing philosophy. With 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 longer. The 43/30T chainring combo combined with a wide chain line increases tire clearance while providing ideal gearing for venturing off-road.X-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 (43/30T chainrings only)Longer DUB crank spindle accommodates both Road and MTB width frame bottom bracket standards for unmatched cross-compatibility across brandsRequires Wide front derailleurDUB bottom bracket adds durability and simplicityCan be upgraded to a power meterSpeed: 12BB Compatibility: All SRAM Road WIDE DUB BBs, except AiChainring Size: 43/30TCrank arm length: 165mm, 167.5mm, 170mm, 172.5mm, 175mm, 177.5mmChainline: n/aBB Spindle Interface: DUBChainring material: AluminiumGuard: n/aBolt Circle Diameter (BCD): 94 BCDCrank arm material: CarbonColour (Crank arm): Unicorn Grey w/Laser FoilPower meter: n/aPower Meter Type: n/a