The QUARQ XX1 Eagle power meter Boost cranks are composed of the Eagle DUB power meter Boost spider for 52 mm chainlines and the XX1 Eagle crankarms with DUB axle. It serves all Eagle XX1 riders as an entry into the world of power measurement. You benefit from the DZero technology, which has been tried and tested for years and scores with such practical features as temperature compensation, automatic calibration and integrated cadence sensors. Performance data is measured on both sides with an accuracy of 1.5 %. In addition, the power meter is of course equipped with ANT+ and Bluetooth. In the cranks, the simplicity of the innovative DUB bottom bracket standard and the power measurement know-how of QUARQ come together.