Sram: Our 43/30T chainring combo combined with a wide chainline increases tire clearance while providing ideal gearing for venturing off-road. But gravel riders need power measurement too, so we’ve elegantly integrated Quarq technology into the DUB spindle, stealthily gathering the data you need to progress.FEATURESDUB-PWR spindle-based unit measures left side power to calculate total wattsProven Quarq reliability and accuracyLong battery life (400+ hours) to power a season of ridesUser replaceable AAA lithium batteryDUB bottom bracket adds durability and simplicityWaterproof (IPX7 waterproof to 1 meter for 30 mins)Lightweight (less than 40g heavier than standard crankset)Wide chainline crankset for bikes with up to 700x45c or 27.5x2.1” tire widths (43/30T chainrings only) SPECIFICATIONSSpeeds: 12BB Compatibility: All SRAM Road WIDE DUB BBs, except AiChainring Size: 43/30TCrank arm length: 165mm, 167.5mm, 170mm, 172.5mm, 175mm, 177.5mmChainline: 47.5mmBB Spindle Interface: DUBChainring material: AluminumGuard: n/aBolt Circle Diameter (BCD): Direct Mount (DM)Crank arm material: CarbonColor (Crank arm): IridescentPower meter: YesPower Meter Type: Spindle