Sram Red AXS Power Meter 1x Aero DUB 172.5x48 Aero DUB crankset blackSingle ring drivetrain simplifies functionality 48 and 50t variants have fully integrated power into a direct mount aero chainring 36 46t variants have spider based power Power readings are accurate within + 1. 5% and arent 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