Sram: X0 Eagle AXS Transmission Left arm Spindle Power Meter provides riders with accurate, live power data delivery housed in our most advanced aluminum crankset. The power meter technology is integrated through what we call “DUB-PWR” – a unique design that elegantly houses Quarq’s reliable and accurate power measurement inside the DUB crank spindle itself. Measuring left-side power to calculate total watts, it’s subtle, lightweight, compatible with any chainring setup, and boasts unbeatable battery life. It is also compatible with the Flight Attendant system, allowing for total connectivity between all AXS enabled components. No-compromise, no-fuss data delivery with robustness in mind.FEATURESInnovative DUB-PWR design allows for lightweight, subtle Quarq power integration.Compatible with Flight AttendantUnique, groundbreaking design integrated with the lightest aluminum crankset on the market.+/- 3% accuracyLong battery life (400+hours)User replaceable AAA lithium batteryWaterproof (IPX7 waterproof to 1 meter for 30 minutes)Right arm, Bottom bracket, Chainring and Spider not included SPECIFICATIONSSpeeds: n/aCrank arm length: 165mm, 170mm, 175mmBB Compatibility: All SRAM Road WIDE DUB BBs, except AiChainring Size: n/aBolt Circle Diameter (BCD): n/aChainline: 55.0mmBB Spindle Interface: DUBChainring material: n/aGuard: n/aCrank arm material: CarbonColor (Crank arm): BlackPower Meter Type: SpindleHub Spacing Compatibility: n/a