Sram Red E1 1x DUB Aero 175x50 DUB crankset black

Ultra-light hollow carbon fiber crankarms are 29 g lighter than previous generation. X-SYNC wide-tooth narrow-tooth chainring technology provides maximum chain control. Single-ring drivetrain simplifies functionality and reduces weight. Direct mount aero chainrings for better aerodynamics. DUB bottom bracket adds durability and simplicity. Can be upgraded to a power meter