SRAM RED AXS Power Meter Kit -2x12-Speed 8-Bolt Direct - Mount Polar Gray D1

AXS enabled for easy monitoring and firmware upgrades. X-Range gearing technology gives you more range and a smoother gear progression, so you're always in the right gear. Integrated power measurement. Power meter is fully integrated into the chainring set for lighter weight. Power readings are accurate within +/-1.5% and aren't affected by climate conditions during a ride. Improved front shifting performance for crisp and accurate front shifts. Unique chainring shape results in a lighter weight, stiffer, more durable crankset. Integrated chainring design significantly reduces weight. 8-bolt direct mount compatibility only to new RED and Force eTap AXS cranks. Not reverse compatible with prior 8-bolt cranks52/39, 54/41 and 56/43 combinations require dual mount SRAM RED eTap AXS front derailleur, included.