SRAM Apex AXS Wide Left Crank Arm Power Meter Spindle Assembly - 172.5mm 12-Speed DUB Spindle Interface BLK D1 Touchscreen-Yes Perforated upper for the utmost

Perforated upper for the utmost ventilation

Spring loaded upright arms and the caliper arm can be quickly pulled away

Alloy backing plate is 50% lighter than steel backing plate

Beta mix is the service wax of choice and is the BNS shop wax for much of the season because it is so good

SRAM Apex AXS Wide Left Crank Arm Power Meter Spindle Assembly - 172.5mm 12-Speed DUB Spindle Interface BLK D1 Touchscreen-Yes Perforated upper for the utmostSRAM 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