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4iiii PRECISION 3 Shimano R7000 Power Meter

Josh Matthew May 24, 2023
5.00 out of 5 based on 32 customer ratings
(32 customer reviews)


4iiii’s PRECISION 3 power meter combined with Shimano’s R7000 groupset

Clear selection

4iiii PRECISION 3 Shimano R7000 Power Meter

If you currently have a Shimano R7000 crankset on your road bike, this 4iiii PRECISION 3 Shimano R7000 Power Meter is for you! This 4iiii power meter replaces your current left-side crank arm. It measures the power that is generated by your left leg and doubles this value to determine your total watts.

4iiii uses patent pending 3-D tri-axial strain gauge technology in order to achieve +/- 1.0% accuracy, which places it among the most accurate power meters available. When it comes to weight, there is no equal. The 4iiii PRECISION sensor weighs a mere 9 grams – practically nothing! In addition, the power meter features dual ANT+ and Bluetooth SMART compatibility so you can use it with a wide range of devices.

In short, the 4iiii PRECISION Shimano R7000 Power Meter is one of the most accurate, lightweight and affordable direct force power meters available!


Key Product Details


This power meter is compatible with Shimano R7000 cranksets. It can also be installed on other Shimano road cranksets, as long as they use Shimano’s Hollowtech II interface. See Compatibility tab for more information.

Power Measurement:

This 4iiii power meter measures left leg power and doubles the value to account for both legs (assumes both legs are generating the same force).

New 4iiii R7000 PRECISION 3!

The all new 4iiii R7000 PRECISION 3 power meter features the following improvements over the version 2:

  • 800 hours of battery life – the longest coin cell battery life in a power meter on the market!
  • Sleeker, slimmer profile making most incompatibility issues a thing of the past.
  • Stronger antenna for even better connectivity.
  • Indicator light for battery life, successful zero-offset and when the unit has been turned on.

Key Features:

Affordable, accurate to within +/- 1.0%, lightweight at only 9 grams of added weight, 800 hours of battery life (PRECISION 3), CR2032 user-replaceable battery, ANT+ and Bluetooth compatible, easy to install, 3-year warranty. See Specs tab for more information.

Advice From Our Staff:

4iiii left side crank arms are some of our best-selling units. They work with most Shimano cranksets, are affordable and easy to install. The one consideration is they only measure left leg power compared to some other power meters that measure power from both legs (those versions usually cost more however).


Options For This Power Meter

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


Other Versions to Consider

Dual-Sided R7000 Crankset: We also sell the 4iiii PRECISION PRO Shimano R7000 Dual-Sided Crankset which is a complete crankset. It is more expensive, however it measures power from both legs.


Crankset: This 4iiii power meter is compatible with Shimano R7000 cranksets.

Please note, the power meter can also be installed other Shimano road cranksets, as long as they use Shimano's Hollowtech II interface. These cranksets can easily be identified by the two opposing pinch bolts that are used to secure the left side crank arm. Please see the image below and contact us if you have any questions on compatibility.Shimano Hollowtech II Left Crank Arm

Check Frame Clearance: Crank-arm based power meters attach a sensor on the inside of the left crank arm. On some bikes, there is not enough room between the left crank arm and the chainstay for the sensor to clear the frame. Therefore, you should make sure you have at least 8 mm of clearance for the PRECISION 3. Also, make sure that you don't have a bottom bracket mounted rear brake (used on some aero and TT bikes). The important area to measure is right in the middle of the crank arm. Please refer to the image below.

If you find that your clearance is close but not quite sufficient, what many people will do is simply install a 1 or 2 mm bottom bracket spacer (between the left crank arm and the frame). This should provide you with the clearance you need.

The clearance between the frame and left side power meter crank arm

4iiii PRECISION Shimano R7000 Specs

Name4iiii PRECISION Shimano R7000
Bike TypeRoad
Location of Power MeasurementCrank Arm
Left or Both Legs MeasuredLeft only
Independent Left/Right MeasurementNo
Crank Arm MaterialAluminum
Communication ProtocolANT+ and Bluetooth SMART
Claimed Accuracy+/- 1.0%
Automatic Temp. CompensationYes
Weight9 grams (added weight)
Battery TypeCR2032 coin cell
Battery Life800 hours
Method of Cadence MeasurementAccelerometer
Warranty3 years

In the Box

  • 4iiii PRECISION Shimano R7000 Power Meter
  • CR2032 coin cell battery

Tools Needed for Installation

You will need the following tools for installation of this product. You can purchase many of these commonly used tools in our store.

  • Shimano Crank Arm Cap Tool
  • 5 mm Allen key

Common Questions and Answers

Question: How do I determine what length my current cranks are so I can make sure I get the same size?

  • Your crank arm length should be printed or stamped on the inside of the left crank arm, usually near the pedal end.

End of crank arm showing crank arm length

Question: What color is the 4iiii R7000 Power Meter?

32 reviews for 4iiii PRECISION 3 Shimano R7000 Power Meter
  1. Bob Weiss

    Just getting started with power meter. Straight forward ordering and installation process. Really good documentation online covering selection, installation, and usage. Looking forward to gets some analytics for my rides.

    • Power Meter City

      Hi Bob! Welcome to power! Good luck on your future rides and we hope you continue to enjoy your 4iiii R7000 power meter. Let us know if there is anything else we can help you with!

  2. Tim Ma (verified owner)

    This is my first power meter and it works great. I had no problems with the ordering process (double check crank arm length) and it shipped faster than expected. There’s a PDF file online at this site that allows you to check crank/chain stay clearance too. Installation was very straightforward since it’s the non-drive side crank. Love finally having the data to train properly. I’ve probably put about 250 miles on it and it works flawlessly paired to both my Wahoo bolt and Garmin watch.

    • Power Meter City

      Good choice on your first power meter Tim! The 4iiii PRECISION Shimano R7000 is truly an amazing power meter! Good luck on your future rides and we are here if there is anything else we can help you with!

  3. Mark Gehring (verified owner)

    Powermeter City was great – they shipped immediately as promised and I got in a few days. Initially had some confusion as I thought a Garmin Forerunner 245 could talk to this. It will not pair, and the folks at Powermeter City confirmed that – I wish I would have asked them before I bought the watch. Also, they answered my question after only 2 hrs on a Sunday ! The watch will work if you download the CyclingDF7 or DF4 data field from Garmin IQ, but neither Garmin nor Strava will use the data. So, I bought a Garmin Edge 830, and I am very happy with everything. Not the slightest problem.

    • Power Meter City

      Hi Mark. Thank you for this! We are glad you are enjoying them. Please let us know if there is anything else we can help you with!

  4. Sam (verified owner)

    Fantastic product (4iiii power meter) and even better service!

    • Power Meter City

      Hi Sam. Thanks for this kind review. We appreciate your business and we are here if there is anything else we can do!

  5. Gangstead (verified owner)

    Very happy with the 105 left crank power meter. I see no reason to spend extra to get Ultegra/ Dura Ace left crank that is a few grams lighter. Install takes 5 minutes and another minute for pairing. Power Meter City shipped almost instantly.

    • Power Meter City

      Hi Ganstead. We are happy to you’re liking your 4iiii PRECISION Shimano R7000 Power Meter – great power meter btw! We hope you continue to enjoy them and we are here if there is anything else we can do!

  6. Anthony Franzmann (verified owner)

    Really happy with this Power Meter – easy to install and integrate with my Wahoo and Zwift. My indoor training and outdoor power readings are now the same – makes training so much more consistent and results uploaded to Training Peaks for analysis more meaningful.
    High quality components, and calibration is a breeze – less than 60 seconds – the 4iiii is smaller than the cadence meter I used to run on my left crank arm – runs both Bluetooth and ANT+ connections for convenience whether your on a smart trainer or outdoors.
    Service from Josh was prompt and Power Meter City was able to organise expedited shipping at my request.
    Impressive company and products!

    • Power Meter City

      Hi Anthony. Good job on your training! We are glab you liked your 4iiii PRECISION R7000. We hope you continue to enjoy them and please let us know if there is anything else we can help you with!

  7. Scott Sherman (verified owner)

    Purchased the R7000 for my wife as a birthday gift. She had hinted that she was interested in how much power she was producing. Although she is using a 6800 they were out of stock at the time. The R7000 works perfectly. Connected seamlessly with her Element and off she went. Very happy with this purchase.

    • Power Meter City

      Hi Scott. Sweet! We are glad your wife liked it. We hope she will continue to enjoy her Stages, we are here if there is anything else we can help you with!

  8. Max Wolffe (verified owner)

    I’m a huge fan of this power meter. Relatively inexpensive, shipped quickly, and was easy to install. I’ve done about 200 miles on it and I really enjoy having power meter data for my outdoor rides. I’d recommend this product and Power Meter City to a friend.

    • Power Meter City

      Hi Max. Thanks for this amazing review on your 4iiii PRECISION Shimano R7000. Doing great on your outdoor rides – keep it up! We hope you continue to enjoy them and we are here if there is anything else we can do!

  9. paul price (verified owner)

    Really happy with this power meter. Its on the cheaper end to get into power meters and was a breeze to install and connect to my wahoo. Power meter city had very quick turn around time from the moment I ordered to when I got it. It was like 2 business days and it was on my doorstep. That will probably be variable upon your location, but I’m glad I wasn’t waiting weeks to get it. Very happy and will be back to power meter city in the future should I ever need a new/upgrade power meter!

    • Power Meter City

      Hi Paul. Thanks for this kind review – we really appreciate it! We are glad you got it within 2 days! We hope you continue to enjoy them and please let us know if there is anything else we can do!

  10. Andy (verified owner)

    It works as advertised. Much lighter than my previous power meter (70 grams difference). Just slightly heavier than stock crank arm. Would get a rechargeable one next time just for a slimmer profile.

    • Power Meter City

      Hi Andy. Thank you for leaving a great review for your 4iiii PRECISION R7000. We hope you continue to enjoy them and please let us know if there is anything else we can do!

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