• Pedaling Measurement & Display
  • Analyse and improve your pedaling

Pioneer exclusive technology makes it possible to
measure, display, analyze, and improve your pedaling

Pioneer has developed a training tool for riders to improve their abilities more efficiently. This new system allows training with a focus on pedaling for power training that surpasses all other available systems. While riding, pedaling efficiency and other data are measured and displayed in real time. After riding, the rider's strengths and weaknesses are analyzed via the Cyclo-Sphere web-analysis service. Analysis results can also provide feedback on ways to improve for the next training session. With repeated use, riders can achieve more ideal pedaling skills. When athletes use this system in their training with specific areas for improvement in mind, it will allow them to attain better results in future races and other events.

Exclusive Technology

[Pedaling Measurement & Display]

Learn about the characteristics of
your own pedaling in real time

The Pioneer pedaling monitor system makes it possible to measure and display not only cadence and individual left and right power, but also, for the first time in any power meter, power output and power direction at thirty degree intervals. The measured power output and power direction are displayed as easy to understand "force vectors", so that anyone can quickly discover their own pedaling characteristics.

The world-first* high-precision sensor and advanced function cycle computer provide
"power output" and "power direction" at 12 locations (every 30°) in each pedal rotation

*As of Sept. 2013 For a pedaling monitor system capable of measuring/displaying pedaling at 30° intervals

Strain sensors attached to left and right crank arms detect minute changes in the cranks and converts them to two types of data, power in the rotational direction and power in the radial direction.
By combining the two types of data, the system displays not only the amount of power, but also the direction of the power applied to the crank, using the system's unique "force vector" display.

[Advanced Function Cycle Computer]

  1. Left Force Vector
  2. Right Force Vector
  3. Left Power
  4. Right Power

[High-precision Sensor]

  1. Right Detector
  2. Right Transmitter
  3. Left Transmitter
  4. Left Detector


SGY-PM900H series
  1. Magnet Ring
  2. Patch type Magnet
  3. Arm type Magnet

Pedaling characteristics displayed visually <Sample screen from SGX-CA900>


Relative length indicates force


Direction in which force is applied
is displayed


Force contributing to rotation is
displayed in red


Force not contributing to rotation is
displayed in blue

The force vector is a directional visualization that allows you to check your pedaling status at 30° intervals throughout rotation. The length indicates the relative force, and the arrow indicates the direction in which the force is applied.
The red arrow refers to force contributing to rotation and the blue arrow indicates force not contributing to rotation.

Quantify your pedaling conditions

Out of the total force applied to the crank over one rotation, the proportion of force contributing to the rotation is quantified as "pedaling efficiency".
Your pedaling conditions are visualized numerically to provide an easy to understand guide for efficient pedaling training.


Combined vector of tangential direction force and radial direction force.
Tangential direction
Radial direction
Direction from 0-11 o' clock

Left foot pedaling

Right foot pedaling

Pedaling efficiency for both feet

Improve pedaling efficiency to go faster, farther.

When pedaling efficiency is high, it means that your pedaling is being converted into propulsion. On the other hand, when pedaling efficiency is low, it means that your power is not providing propulsion.
If you can achieve efficient pedaling, even with the same effort, you will be able to ride faster and farther.

High-precision power measurement made possible by Pioneer Exclusive Technology

In the past, many power meters displayed high values at moments when the pedal was pressed down strongly. However, this pedaling monitor sensor totals the force contributing to rotation for an entire rotation out of 12 locations at 30° intervals and calculates the result.
Because of this, it is possible to measure and display power with high precision.

Web Analytical Service

[Analyse and improve your pedaling]

Using the web analysis service Cyclo-Sphere,
find ways to improve your rides.

Click here for a Cyclo-Sphere sample
Cyclo-Sphere Analysis Sample

After races or training, data stored on the cycle computer can be uploaded to the web analysis service Cyclo-Sphere and analyzed.
You can check the route of your ride, left/right power during ride, pedaling efficiency, force vectors, and cadence.
Additionally, by combining use of the speed sensor and heart rate sensor, you can customize the display to your preference from a wide variety of data

and find ways to improve your pedaling and riding.
For example, see right away where your pedaling was efficient and where it was not efficient to improve your riding.
Finding areas for improvement leads to better performance on your next ride.

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Relationship between Pedaling Efficiency and Power Values (Example for an Uphill Ride)

*When checking pedaling skills using pedaling efficiency values, exertion conditions such as uphill rides, accelerations, or rides with wind resistance are recommended.

Take a look at the data changing over the course of an uphill ride in a time series graph.

Power Phase

A Interval

Keeping the pace

Pedaling efficiency and pedaling power are mostly constant

B Interval

Starting the power phase

While keeping pedaling efficiency, power increases right before the power phase

C Interval

Exhausting legs as a result of the power phase

Pedaling efficiency is lost and there is a sudden drop in power

Focusing too much on increasing power can easily result in a degradation of pedaling technique,
but by increasing one's pedaling skills one can achieve a ride
where losses are minimized and pedaling efficiency is maintained.