* Single-ring drivetrain simplifies functionality and reduces weight* Non-aero direct mount chainrings from 38T to 46T can be swapped with a single tool* SRAM X-SYNC wide-tooth, narrow-tooth chainring technology provides maximum chain control* Ultra-light hollow carbon fiber crankarms* DUB bottom bracket adds durability and simplicity* Can be upgraded to a power meter* SRAM Model ID: FC-RED-1W-E1