What Our Gearhead(R) Experts Are Saying: "I trust the RED AXS Aero Power Meter Kit for race days and intense training blocks. It's super lightweight and seamlessly integrates into my setup. The single-ring design makes it simple and bulletproof, and even when temperatures swing, my data stays consistent."When our goal is peak performance, we turn to SRAM's RED AXS Aero Power Meter Kit. SRAM has long been a pioneer in cycling innovation, and this power meter, fully integrated into a direct mount chainring, reflects that heritage. The result is a sleek, lightweight, and aerodynamic system that delivers pinpoint accurate power data (+/-1. 5%) without flinching at changes in weather. Designed around a simple and reliable single-ring drivetrain, the RED AXS Aero Power Meter Kit keeps our focus sharp and shifting effortless. SRAM's X-SYNC tooth technology maximizes chain retention for all-out sprints and rough patches, while ANT+ and Bluetooth connectivity make it a breeze to track and analyze every watt. Available in an array of sizes from 56t to a massive 68t, it's made for every road, time trial, and triathlon pursuit.