The Sram Red 1 AXS power meter offers improved aerodynamics for triathlon and time trial bikes thanks to direct mount aero chainrings with fully integrated power. Single-ring drivetrain simplifies functionality. Fully integrated power into a direct mount aero chainring. Power readings are accurate within +/-1.5% and aren’t affected by climate conditions during a ride. Power balance measures left and right legs separately. Sram X-Sync wide-tooth narrow-tooth chainring technology provides maximum chain control. Laser-etched chainring finish is more durable. DUB bottom bracket adds durability and simplicity