Sram: Every innovation in Quarq’s DZero platform represented the 10+ years of Quarq’s advances in power meter technology. This same platform is now combined with XX1 Eagle™ DUB CARBON TUNED™ crankset - lightest, stiffest and strongest to date, and X-SYNC 2™ chainring - providing significantly quieter performance, with better mud clearing and extraordinary durability. Ready to power every ride.FEATURESBluetooth low energy technology and ANT+ wireless data transferMagicZero - automatically checks and recalibrates your power meter as you ride – no need to manually calibrateAxCad -- no cadence magnet required10K Temperature CompensationBattery -- CR2032, 200-hour battery life, change without toolsOmniCal -- swap chainrings without affecting accuracy2-year warrantyIPX7 waterproof ratingAccuracy -- within 1.5%, measuring both legs. SPECIFICATIONSSpeeds: 12Crank arm length: 170mm, 175mmBB Compatibility: DUB:BSA73, PF89.5, PF92, PF30 MTB73, BB30 MTB73, BSA MTB68SPChainring Size: 32TBolt Circle Diameter (BCD): 104 BCDChainline: n/aBB Spindle Interface: DUBChainring material: AluminumGuard: No GuardCrank arm material: CarbonColor (Crank arm): Natural carbonPower Meter Type: Spider