This SRAM Red AXS Powermeter kit offers the ultimate in integrated power measurement, adding Quarq technology to the one-piece chainrings for the lightest, stiffest, and most accurate power package available. A 13-tooth jump on all chainring combinations ensures precise shifting with any setup, as well as a less dramatic change in cadence when shifting forward. X-Range gearing technology offers more range and a smoother gear progression. The power meter is fully integrated into the chainring for lower weight. Power readings are accurate to within +/-1.5% and are not affected by weather conditions. Measures right and left leg power balance for sharp and precise front shifting. Unique chainring shape results in a lighter, stiffer, more durable unit. SRAM Part Number: 735578 EAN Code: 710845904752 Supplier Number: 00.3018.387.002 Retail Packaging: Yes