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.