SRAM's new XX SL Eagle AXS Transmission Powermeter Crankset brings integrated power readings straight to our head unit with /- 1. 5% accuracy. This new spider-based design uses SRAM's new proprietary chainring mount system, which reduces the overall weight without compromising reliability. It features a dual-sided power measurement system that measures our total watts and lasts up to 200 hours. It also features high-performance technologies such as MagicZero, which automatically checks and recalibrates our power meter as we continue to ride.