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, it’s 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. FEATURES All new design with proprietary chain rings, available in 32-38t. Compatible with Flight Attendant. Unique, groundbreaking design integrated with our lightest crank ever. +/- 1.5% accuracy. User replaceable CR2032 battery 200-hour battery life. Bluetooth low energy technology and ANT+ wireless data transfer. MagicZero - automatically checks and recalibrates your power meter as you ride. AxCad -- no cadence magnet required. 10K Temperature Compensation. Waterproof (IPX7 waterproof to 1 meter for 30 minutes). SPECIFICATIONS Speeds: 12 BB Compatibility: DUB:BSA73, PF89.5, PF92, PF30 MTB73, BB30 MTB73, BSA MTB68SP Chainring Size: 34T Crank arm length: 165mm, 170mm, 175mm Chainline: 55.0mm BB Spindle Interface: DUB Chainring material: Aluminum Guard: No Guard Bolt Circle Diameter (BCD): Thread Mount Crank arm material: Carbon Color (Crank arm): Black Power meter: Yes Power Meter Type: Spider