When you need the absolute best from your training data, the pro-proven accuracy and reliability of the RED AXS power meter is the way to go. Integrated into the chainring itself, it's light, stiff and aero, accurate to +/-1.5% even as weather conditions change, and retains chains even when you hit rough stuff.Features- AXS enabled for easy monitoring and firmware upgrades- Single-ring drivetrain simplifies functionality- Fully integrated power meter into a direct mount aero chainring- Power readings are accurate within +/-1.5% and aren't affected by climate conditions during a ride- X-SYNC wide-tooth, narrow-tooth chainring technology provides maximum chain control- Available in 48T, 50T, 52T, 54T, 56T, 58T, 60T, 64T, and 68T