quarq-dfour91-power-meter-crankset-175mm-11-speed-110-asymmetric-bcd-386-evo-bb30-pf30-spindle-interface-black
quarq-dfour91-power-meter-crankset-175mm-11-speed-110-asymmetric-bcd-386-evo-bb30-pf30-spindle-interface-black, Quarq's power meter cranks continue to be reliable, accurate and easy to use. The Dfour91 model accepts Shimano Dura Ace 9100 and Ultegra R8000 road chainrings and offers more data transfer and frame fit compatibility.DFour91 is compatible only with Dura Ace 9100 and Ultegra R8000 chainringsMeasures power for both legs with +/_ 1.5% accuracyDual Bluetooth lowenergy and ANT+ wireless data transferAxCad system provides no-magnet cadence dataFree firmware updates with the QALVIN APPUses a CR2032 battery that can be replaced without toolsSwap chainrings without needing to recalibrate