SRAM Apex AXS Wide Left Crank Arm and Power Meter Spindle Assembly - 172.5mm 12-Speed DUB Spindle Interface Black D1. Accurate reliable power measurement is practically a requirement these days and the Apex AXS crankarm power meter upgrade is the easiest way to get precise power numbers. With the tech hidden inside the DUB spindle it fits almost any bike while remaining stealthy.

DUB-PWR spindle-based unit measures left side power to calculate total watts

Proven Quarq reliability and accuracy

Long battery life (400 hours) to power a season of rides

Waterproof (IPX7 waterproof to 1 meter for 30 minutes)

DUB bottom bracket (Sold separately) adds durability and simplicity

Right crank arm bottom bracket spider and chainrings NOT included