This is the ultimate in integrated power measurement. The RED AXS powermeter kit adds Quarq technology to our RED chainrings for the lightest, stiffest and most accurate powermeter available. A 13-tooth difference on all chainrings ensures precise shifts for any setup, as well as a less dramatic change in cadence during front shifts. Combined with our most durable chainrings ever, it's an unbeatable combination. The powermeter is fully integrated into the chainring. It measures power on both crank arms and is highly accurate with a tolerance of just 1.5%. For riders who want to get the most out of their training, the proven accuracy and reliability of the RED AXS power meter is the right choice. Integrated into the chainring itself, it is light, stiff, and aero. The power meter also offers high accuracy of +/-1.5%, even when weather conditions change. Single setup simplifies functionality. Fully integrated power meter in a direct mount aero chainring. Power readings are accurate to within +/-1.5% and are not affected by weather conditions. X-SYNC wide and narrow tooth chainring technology provides maximum chain control. SRAM Article number: 735584 EAN code: 710845904721 Supplier number: 00.3018.386.002 Retail packaging: Yes