SRAM RED 1 AXS Power Meter Crankset - 165mm 12-Speed 50t Aero Chainring 8-Bolt Direct Mount DUB Spindle Interface Natural Carbon E1Power meter is fully integrated into the chainring for lighter weight and greater accuracy Power readings are accurate within + 1. 5% and arent affected by climate conditions during a ride Measures right and left leg power balance Ultra light hollow carbon fiber crankarms are 29 g lighter than previous generation DUB bottom bracket adds durability and simplicity SRAM Model ID: FC RED 1P E1 TECH SPECS Crankset Material Carbon BB Inclusion No Crank