This is the ultimate in integrated power measurement. The RED AXS power meter kit adds Quarq technology to our RED chainrings for the lightest, stiffest, and most accurate power meter available. A 13-tooth difference on all chainrings ensures precise shifts for every configuration, 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 power meter is fully integrated into the chainring. Measures power on both crank arms. 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. It is integrated into the chainring itself, is light, stiff, and aero. The power meter also offers high accuracy up to +/-1.5%, even when weather conditions change. Single setup simplifies functionality. Fully integrated power meter in a direct mount aero chainring. Power measurements are accurate to within +/-1.5% and are not affected by weather conditions. X-SYNC chainring technology with wide and narrow teeth offers maximum chain control. SRAM Article number: 736950 EAN code: 710845918971 Supplier number: 00.3018.386.003 Retail packaging: Yes