Fully 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 aren�t 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 chainring finish is more durable Direct Mount 48T Black 12sp Narrow/WideUPC/EAN/GTIN: 710845825538