SRAM Rival AXS Wide Left Crank Arm and Power Meter Spindle Assembly - 165mm, 12/13-Speed, DUB PM Spindle, Black, E1

The Rival AXS left crank arm puts a power meter right where it belongs—built into the DUB spindle unit. No external sensors, no complicated setup. Install, pair with your device, and start riding with real-time power data. This wide aluminum crank arm measures left-side power to calculate your total watts, giving you accurate performance metrics for every ride. The spindle-based design keeps everything compact and integrated. Expect season-long battery life and IPX7 waterproofing rated to 1 meter for 30 minutes, so rain and splashes won't slow you down. Compatible with 12/13-speed drivetrains. Right crank arm, bottom bracket, spider, and chainring sold separately.