Part of SRAM's new line of Eagle Transmission, the XX Eagle AXS Transmission Powermeter Crankset features a groundbreaking design that combines SRAM's elite carbon crank design and durable aluminum 32T chainring. It measures left-side power directly inside the DUB crank spindle and boasts an insane battery life of 400+ hours. This lightweight crank with an integrated power meter is compatible with the Flight Attendant system, allowing total connectivity between all of our AXS-enabled components. The Black 2 Guards version comes with 2 removable bash guards that are mounted to the chainring. It comes with a 32t chainring, but you can use any 8 bolt direct mount chainring. This crankset's DUB-PWR spindle power meter is lightweight and offers an accuracy of +/-3%. The Black version is a spider based power meter that is extremely accurate at +/-1. 5%. It comes with a 32t chainring, but any thread mount chainring will fit. MagicZero recalibrates your meter while you ride and AxCad calculates cadence without a magnet to keep accuracy high.