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4iiii PRECISION Power Meter For Shimano DURA-ACE 9000

josh December 4, 2018
5.00 out of 5 based on 2 customer ratings
(2 customer reviews)

$599.99 $449.99

4iiii’s accuracy and innovation paired with Shimano’s top end DURA-ACE group set

Clear selection


4iiii PRECISION Power Meter For Shimano DURA-ACE 9000

Used by the World Pro Etixx-Quick-Step Team, the 4iiii PRECISION Power Meter for Shimano DURA-ACE 9000 is the lightest, most affordable direct force power meter available. The added weight of the 4iiii PRECISION is only 9 grams and it is accurate to within +/- 1%.

The 4iiii PRECISION is a left-only crank arm-based power meter and replaces your current left side crank arm. The 4iiii takes the power that is generated by your left leg and doubles it in order to determine your total power output.

In addition to being affordable, lightweight and highly accurate, the 4iiii PRECISION measures precise cadence data, has 3D power meter technology capable of measuring tri-axial strain and is compatible with both ANT+ and Bluetooth SMART devices.



Crank arm lengths: 165 mm | 170 mm | 172.5 mm | 175 mm



The 4iiii PRECISION Power Meter is compatible with all Shimano Hollowtech II road cranks.


In the Box

  • 4iiii PRECISION Power Meter For Shimano DURA-ACE 9000
  • 2 2032 coin cell batteries
  • Quick Start guide



Bike TypeRoad
Location of Power MeasurementCrank Arm
Left or Both Legs MeasuredLeft only
Independent Left/Right MeasurementNo
Communication ProtocolANT+ and Bluetooth SMART
Claimed Accuracy+/- 1.0%
Weight9 grams (added weight)
Battery TypeCR2032 coin cell
Battery Life100 hours
Method of Cadence MeasurementAccelerometer
Warranty1 year

2 reviews for 4iiii PRECISION Power Meter For Shimano DURA-ACE 9000

  1. Rated 5 out of 5

    Jeremy (verified owner)

    Bought this a while ago and had been training with it regularly, product arrived in a couple of days and overall user experience had been great.

    Pairing with Garmin 520 is easy, updating the firmware via mobile app is a snap too, most important of all I could finally train with peace in mind knowing I’m within the correct zones and prepare for the strength and skills needed later for climbing.

    Great product and excellent services, highly recommended.

    • Power Meter City

      Power Meter City

      Hi Jeremy, We have had great success with the PRECISION in terms of both accuracy and reliability. Glad you are enjoying it. Let us know if there is anything else we can do for you.

  2. Rated 5 out of 5

    Wyatt Du Plessis (verified owner)

    Amazing service.. This is my 2nd power meteri bought here. The service is very good and I am extremely happy about the product.. I have recommended power meter city to all my friends here is South Africa

    • Power Meter City

      Power Meter City

      Hi Wyatt. Thanks for the review and for being a great customer. We’re here if there is anything else we can do!

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