SRAM Force D2 2x Wide Power Meter Crankset Speed: 12 Spindle: 28.99mm BCD: Direct Mount 43/30 DUB 177.5mm Black Road Disc43 30T chainring combo combined with a wide chainline increases tire clearance while providing ideal gearing for venturing off road. But gravel riders need power measurement too, so theres elegantly integrated Quarq technology into the DUB spindle, stealthily gathering the data you need to progress. DUB PWR spindle based unit measures left side power to calculate total watts Proven Quarq reliability and accuracy Long battery life (400+ hours) to power