Cyclo Computer SGY-PM900H79

A revolutionary new power meter. Introducing the Pedaling Monitor Sensor. World's first* high-precision measurement of "force" and "direction of force" for every 30˚ of rotation. Measures in 12 different locations per cycle.


World first* measurement of "force" and "direction of force" every 30˚ of rotation

*The "SGY-PM 900" is the first system to measure and display results for every 30˚ of pedaling rotation.

By detecting minute changes in strain on the crank every 30˚ during pedaling,
the "SGY-PM 900" measures "force" and "direction of force" in 12 locations per cycle.
With this data, analyze the unique characteristics of your pedaling, and quantify your performance as a "Pedaling Efficiency" value.

Independent sensors on the left and right sides measure "force" and "direction of force" from the left leg and right leg separately, each in 12 different locations per cycle.

The independent left and right sensors are installed on the inner side of the crank arm, enabling independent measurement of "force" and "direction of force" on the left and right sides.

Left sensor unit

Right sensor unit

A magnet ring installed on the Bottom Bracket contains magnets in 12 different locations. The device detects the magnets with a magnetism sensor, accurately measuring "force" and "direction of force" every 30˚

  • Magnet sensor
  • Magnet ring
  • Transmitter (sensor unit)

High-accuracy measurement even under harsh conditions

The "SGY-PM 900" operates even under -10℃ to 50℃ temperatures.
In any environment that athletes endure, the "SGY-PM 900" can make stable measurements.

Zero-point calibration, necessary for accurate measurement, can be accomplished simply and quickly.
After it is calibrated several times, the sensor will learn the characteristics of the environment and automatically respond to changes in temperature.

Operates in -10℃ to 50℃ temperatures.

Durability and water-resistance tested
by top athletes in real use

Achieves accurate measurement even under harsh conditions (rain, vibration, etc.)

Reliable measurement on rough roads

200-hour battery (under normal temperatures)
One CR2032 battery each on left and right, easily exchangeable

IPX6 proven water resistance
* IEC-standard water resistance

Product Specifications
  • Independent strain sensors for the left and right sides, highly precise sensing of minute changes on the crank at every 30 degrees
  • Measures the force placed on the crank and loss component *2 for each 30 degrees of rotation
  • The wirelessly transmitted data can be displayed on the cycle computer every second
Weight 72g
External dimensions [Pedaling monitor sensor (right side)]
・Right transmitter:
 60.7 mm(W) × 46.9 mm(H) × 20.1 mm(D)
・Junction box, Strain gauge unit cover:
 63.2 mm(W) × 36.8 mm(H) × 9.9 mm(D)
[Pedaling monitor sensor (left side)]
 100.0 mm(W) × 40.7 mm(H) × 15.7 mm(D)
[Magnet ring]
 φ57.0 mm × 3.5 mm
Water-resistance IPX6
Communications system
ANT+™ *1 standard
Battery CR2032
Battery operating time *3 Approximately 200 hours
(normal temperature)
Guaranteed operational
temperature range
-10 to 50°C
Accessories Magnet ring, Magnet ring attachment for Hollowtech II, Batteries (CR2032), Cable ties, Phillips-head screws, User’s Manual, Important Information for the User, Warranty Card
Implemented crank SHIMANO FC-7900/7950
Compatible Bottom Brackets
The Pedaling Monitor is compatible with 4 types of Bottom Bracket *4; SHIMANO HOLLOWTECH II, BB86, BB30 and PF30. For HOLLOWTECH II the standard SHIMANO Bottom Bracket(BB9000、BB7900、BB6700)may be used, but for BB86, BB30 and PF30 the Bottom Bracket must be replaced with our specific Bottom Bracket Option Parts. These Option Parts are available with Steel or Ceramic Bearings.

Option Parts (Bottom Bracket)
Pedaling Monitor Sensor Bottom Bracket Adapter
(For BB86/Steel Bearings)
Pedaling Monitor Sensor Bottom Bracket Adapter
(For BB86/Ceramic Bearings)

Pedaling Monitor Sensor Bottom Bracket Adapter
(For BB30/Steel Bearings)

Pedaling Monitor Sensor Bottom Bracket Adapter
(For BB30/Ceramic Bearings)


Pedaling Monitor Sensor Bottom Bracket Adapter
(For PF30/Steel Bearings)

Pedaling Monitor Sensor Bottom Bracket Adapter
(For PF30/Ceramic Bearings)

*1 ANT+™ is a low-powered wireless communications standard using the 2.4GHz range.
*2 Loss component
This is the power applied in the direction opposite to crank rotation and the power applied in the radial direction. 
*3 The battery operating time may decrease depending on the operating conditions.
*4 Compatibility with a specific Bottom Bracket does not guarantee compatibility with all frames using that Bottom Bracket. Please consult you dealer.
• Specifications and design are subject to change without notice.
• Crank is not included