Powermeter integration at the crankset level captures your total output before any drivetrain losses, and SRAM's Red AXS E1 DUB Powermeter Crankset puts that measurement capability into their flagship road group. The strain gauges live in the spider, measuring power from both legs as a combined total rather than doubling a single-leg reading. That spider-based approach means the system weighs your actual force application at the point where it enters the drivetrain.

The crankset runs on SRAM's DUB spindle interface, which works with DUB bottom brackets across threaded, press-fit, and T47 shell standards. You're not locked into a specific frame type. The 12-speed chainrings use SRAM's direct-mount interface with the updated tooth profiles designed for their Flattop chain. Chainring swaps take minutes rather than requiring a full crankset removal, so you can adjust gearing for different events without replacing the power meter investment.

Wireless data transmission runs through ANT+ and Bluetooth simultaneously, broadcasting to head units, watches, and training apps without pairing conflicts. The accelerometer-based cadence measurement eliminates the need for a separate cadence magnet. Battery life runs approximately 400 hours on a CR2032, and low-battery warnings give you time to swap before a ride rather than mid-interval. SRAM claims accuracy within plus or minus 1.5 percent, which holds up across temperature variations once the unit completes its auto-zero calibration on each ride start.... Read More