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 step on all chainring combinations ensures precise shifting with every setup, as well as a less dramatic change in cadence when shifting up.X-Range gearing technology offers more range and a smoother gear progressionThe power meter is fully integrated into the chainring for lower weightPower measurements are accurate to within +/-1.5% and are unaffected by weather conditionsMeasures right and left leg power balanceFor sharp and accurate front shiftingUnique chainring shape results in a lighter, stiffer, more durable unitSram Article number: 735580 EAN code: 710845904776 Supplier number: 00.3018.387.004 Retail packaging: Yes