The Pioneer Dura-Ace 9000 Single Leg Power Meter is Pioneer's most affordable step into power measurement and training. Far beyond what a simple hear rate monitor can tell, a power meter is the most valuable and necessary tool any cyclist can use to measure and quantify their efforts. Pioneer's unique Strain-Gauge technology measures the deflection (or bending) of the crank arm to continuously quantify your riding effort. No other cycling tool can accelerate your progress faster than working with a power meter. Pioneer measures pedaling forces every 30?, for 12 points of measurement per revolution. However, within those 12 points, Pioneer scans those pedaling forces an incredible 16 times, for an unbelievable 192 data points each rotation of the crank! This level of measurement is what leads to the accuracy of Pioneer power meters, as well as the basis for HDPower Metrics analysis. Pioneer's Cycle Computer unlocks the HDPower Metrics that allow riders to see Force Vector analysis, as well as Torque Vector and Pedaling Efficiency power metrics. These can be viewed on the Cycle Computer while riding, or in post-ride analysis using Pioneer's free cloud-based Cyclo-Sphere software. The Pioneer Power Meter can easily pair with ANT+ compatible cycle computers and display power measurements that are available on that computer. For the full range of never-been-seen-before data including force vectors, torque vector, and other measurements, it must be paired with the Pioneer Cycle Computer. The Pioneer Power Meter is built to perform in the toughest conditions. It was refined over a punishing season of racing through rain, snow, cobbles, mud and the thigh-burning climbs of the world's most prestigious grand tours. The lightweight Power Sensor is only 22 grams.