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4iiii Precision Pro 3D DUAL cranks with wattmeter, 2x12, Shimano FC-R8100

829 € RRP 1,039 € -20%
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Wattmeter 4iiii Precision PRO is suitable for road riders who use the new 12sp Shimano Ultegra R8100 set and want to enjoy the benefits of power measurement without limitation. This package includes cranks with power meters already installed on both cranks.



  • Accuracy: 99%
  • Battery life: approx. 150-200 hours depending on the ambient temperature
  • Integrated accelerometer for measuring cadence (pace)
  • Wireless firmware updates via Bluetooth
  • Measured power range: 0-1999 W
  • Range of measured cadence: 30-220 revolutions
  • Compatible with ANT+ and Bluetooth 4.0 devices

The measurement is independent of the installed transducers, as it takes place on the crank. The converters can therefore be replaced with a different number of teeth or oval ones without the need for recalibration at the manufacturer.

Product details

Groupset Other
Gears 2x12
product ID 213321

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Bicycle wattmeters / power meters from 4iiii
This Canadian brand is primarily known for its powermeters that could be seen on the World Tour. Their offer also includes heart rate sensors and a smart bike hometrainer. Their prices are reasonable. By the way, you are supposed to read their name as "Four Eyes".

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