Pioneer SGY91 Shimano Dura Ace 9100 Single Side Power Meter (172.5mm)

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Pioneer’s most affordable step into power measurement
Far beyond what a simple heart rate monitor can tell, a power meter is the most valuable and necessary tool any cyclist can use to measure and quantify their efforts. Our unique Strain-Gauge technology measures the deflection (or bending) of the crank arm to continuously quantifies your riding effort. No other cycling tool can accelerate your progress faster than working with a power meter.


12 point force measurement for high accuracy and advanced metrics
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.


Advanced HDPower Metrics further power and pedaling 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. Introduced over two years ago, these innovative features have not been matched by any of our competitors.


Compatible with ANT+ Cycle Computers
ANT+™ is a low-powered (2.4GHz range) wireless communications standard used by most cycle computer brands. 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. 


Upgradable to a Dual Leg power meter system as you grow with your power analysis

Upgrade your analysis by adding a drive side upgrade kit, send in your existing crank to be upgraded to a Dual Leg system. There is no better, or more detailed tool for analyzing power or pedaling balance metrics than a Dual Leg system, especially when combined with Pioneer’s HDPower Metrics.


Race-tested, rider-perfected
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. It’s lightweight, fully-integrated design adds just 64 grams to your crank, measures up to 2,150 Watts @120 RPM, and is accurate to within +/- 2%. It can be easily calibrated for varying temperatures and elevations and is available in red and black transmitter caps.


  • Included Crank: Shimano FC-69100 Dura Ace Crank Arm
  • Crank Arm Length Options (mm): 165 / 170 / 172.5 / 175mm
  • Chainring Options: N/A
  • Left and Right Arm Strain Guages: Left Only
  • 12-Point Force Direction Measurement: Left Only
  • Dual Accelerometers per Crank Arm: Left Only
  • Pioneer Pedaling Monitor Mode: For use with Pioneer Cycle Computers
  • ANT+™ Mode: For use with ANT+ Cycle Computers
  • Discrete L/R Zero Calibration Memory: Left Only
  • Accuracy: +/- 2%

Independent L/R & Total Power: Left Only
Independent L/R & Total Power Loss: Left Only
Independent L/R Force Direction: Left Only
Independent L/R Torque: Left Only
Independent L/R & Total Pedaling Efficiency: Left Only
Independent L/R Torque Effectivenes: Left Only
Independent L/R Pedal Smoothness: Left Only
Accumulated Stress: Yes
Work: Yes

Total Power: Estimated
L/R Power Balance: No
L/R Power Averages: No
Power % of FTP: Yes
Torque Effectivenes: Yes
Pedal Smoothness: Yes
Cadence: Yes
nPower: Yes
Intensity: Yes
Interval Intensity: Yes
Power watts/kg: Yes
Power Zone / Level: Yes

Cyclo-Sphere: Yes
.FIT File Converter: Upgradeable
Strava AutoForward: Yes
TrainingPeaks® Auto Forward: Yes
TrainingPeaks WKO+®: Yes

Wide Road-Bike Frame Compatibility: Yes
Patch Magnets: x1
Alternate Arm Magnets (for low clearance frames): x1
User Replaceable Batteries: Yes
LED Mode Indicator: Yes
Thin Left Crank Arm Sensor: 9mm
Solid Mount Transmitter: N/A
IPX-6 Water Resistance: Yes
IPX-7 Water Resistance: Yes
Batteries: CR2032 x 1
Battery Operating Time: 180 hours
Weight: Crankset and Sensors: 219g
Weight: Sensors only: 22g
Sensor Dimensions -right (W x H x D) mm: N/A
Sensor Dimensions -left (W x H x D) mm: 92.5 × 34.7 × 8.7
Operational Temperature Range: -10 to 50°C
Parts and Labor Warranty: 2 Years
Accessories: Magnet (Patch x 1 & Arm type x 1), CR2032 Battery x 1, User’s Manual

This product was added to our catalog on December 20, 2017