The XX SL Eagle AXS Transmission Power Meter Crankset boasts our new XX SL crank arm with an integrated power meter to record and deliver live, accurate power readings to your head unit. Utilizing an all-new spider-based design, this is our most accurate, high performing power meter. Our new spider design uses a proprietary chainring mount system which has allowed us to reduce weight without compromising reliability. A dual sided power measurement system calculates total watts, its subtle, lightweight, and boasts unbeatable battery life. It is also compatible with the Flight Attendant system, allowing for total connectivity between all AXS enabled components. No-compromise, high-performance data delivery giving you an edge over the competition.