SRAM RED AXS POWERMETER 48T DM AERO BLACKFully integrated power meter into a direct mount aero chainring AXS enabled for easy monitoring and firmware upgrades 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 8 bolt direct mount compatibility only to new RED and Force eTap AXS cranks Laser etched