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4iiii PRECISION PRO Shimano R7000 Dual-Sided Crankset

Josh Matthew June 21, 2022
4.83 out of 5 based on 6 customer ratings
(6 customer reviews)


The most affordable crankset capable of measuring independent left/right power!

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4iiii PRECISION PRO Shimano R7000 Dual-Sided Crankset

The 4iiii PRECISION PRO Shimano R7000 Dual-Sided Crankset combines 4iiii’s patent pending 3-D tri-axial strain gauge technology with Shimano’s 105 R7000 crank. The result is an accurate, lightweight and highly reliable power meter crankset that is capable of tacking the most grueling workouts or races.

The dual-sided 4iiii R7000 Power Meter Crankset also features independent left/right power measurement. With a power sensor located on the inside of both crank arms, the power meter can measure the forces generated by each leg individually. In fact, this power meter is the most affordable crankset capable of measuring left/right power.

The 4iiii is also extremely lightweight, adding approximately 20 grams to the Shimano R7000 crankset. The power meter is compatible with both ANT+ and Bluetooth SMART devices and is accurate to +/- 1.0%.



  • Chainrings: 50/34 | 52/36 | 53/39
  • Crank arm lengths: 165 mm | 170 mm | 172.5 mm | 175 mm


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


Bottom Bracket: This power meter uses a 24 mm Shimano road spindle and must be used with a 24 mm Shimano bottom bracket.

Tip - If you already have a Shimano crankset on your bike, then this power meter will fit your bottom bracket perfectly as all Shimano cranksets use a 24 mm spindle.

Check Frame Clearance: Crank-arm based power meters like this one 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 10 mm of clearance between the left crank arm and the chainstay - and 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 you have around 7-9 mm of clearance, what many people will do is simply install a 1 or 2 mm bottom bracket spacer (between the left crank arm and the frame), which will give them the clearance they need.

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

4iiii PRECISION PRO Shimano R7000 Power Meter Specs

Name4iiii PRECISION 2 PRO R7000
Bike TypeRoad
Location of Power MeasurementCrank arm
Left or Both Legs MeasuredBoth
Independent Left/Right MeasurementYes
InstallationMore involved (60 min. estimated)
Crank Arm MaterialAluminum
Communication ProtocolANT+ and Bluetooth SMART
Claimed Accuracy+/- 1.0%
Active Temperature CompensationYes
Weight694 grams (170 mm, 50-34T)
Battery TypeCR2032
Battery Life100 hours
Method of Cadence MeasurementAccelerometer
BCD110 4-bolt asymmetric
Spindle Size24 mm
Q Factor146
Warranty3 years

In the Box

  • 4iiii R7000 Power Meter Crankset
  • 2 CR2032 coin cell batteries
6 reviews for 4iiii PRECISION PRO Shimano R7000 Dual-Sided Crankset
  1. Barry (verified owner)

    The installation on the bike was easy. The batteries were already installed so I have no idea how old they are out of the box. The instructions for connecting the sensors was relatively easy to do but could benefit from adding more information as to what is being connected. The dual sided crankset pairs and gives two device indications which I assumed was Left and Right. However I now believe one is for power and one is for Cadence. Since I use a different cadence sensor I didn’t enable on the crankset. After 10 workouts on a Magnet trainer I have found the connectivity to drop at times. I have the crankset paired to a Garmin Edge 1030 Plus and have lost the power reading for both sides at the same time 7 out of the 10 workouts. On all but one of those occasions the sensors reconnected on the own after a short time. On one occasion the power sensors dropped and would not reconnect. The readout froze. Over the course of 30 minute workouts it has dropped connectivity 3 – 5 times during the workout. Other trainers with power sensors I have had connected to this Garmin never dropped connections so I am led to believe the issue is in this crankset. Eventually I will change out the batteries and see if the drops go away. Even though it is a little frustrating losing data for a brief time I am not doing the kind of training that is all that important. If averages get skewed a little I’m okay with it.

    • Power Meter City

      Hi Barry. Thanks for this great review on your 4iiii PRECISION PRO Shimano R7000 Dual-Sided Crankset. We are here if there is anything else we can do!

  2. Anddrew Rowden (verified owner)

    Great communication and quick painless delivery. I was a little apprehensive about ordering from California to Ontario Canada so the delivery process was easier and quicker than I expected.
    The power meter itself has been very good so far. The iPhone app was a bit finicky in getting both left and right sensor updated to the latest firmware, but was still a quick enough process, and everything has been smooth after that.

    • Power Meter City

      Hi Andrew. We really appreciate this! We are glad it arrived faster than expected. We hope you continue to enjoy your new 4iiii PRECISION PRO Shimano R7000 Dual-Sided Crankset! Please let us know if there is anything else we can help you with!

  3. Steve S (verified owner)

    As a Canadian, there has to be a good reason to order things internationally. Rest assured, Power Metro City has the goods. First off, the website is a great resource to those considering power meter options. Second, selection was better than anything in Canada. Third, price was pretty comparable and usually better. Bit with the pandemic, sourcing power meters is even harder. So I’m glad Power Meter City came though. It shipped out very fast. Unfortunately, there were delays (outside of the company’s control). But when I reached out for a status update on where the unit was, Power Meter City was responsive (answering the same day!). I now have the unit. It is as advertised. And free shipping made it actually cheaper than if I bought it domestically!

    5 stars! Great experience.

    And yes, the unit works great too. Though there are some online rumblings about left-right balance accuracy/reliabilty with Shimano power meters. Works well enough for me. Cheaper than pedals. No complaints here!

    • Power Meter City

      Hi Steve. Awesome! We are glad it came and worked great as expected! We also wanna thank you for being a great customer – we really appreciate it. Please let us know if there is anything else we can do!

  4. Patrick Wilson (verified owner)

    So far, so good. Did a power comparison on a ride on the Wahoo Kickr Snap and observed a 3% difference. Easy to calibrate, make sure to have all the firmware updated. If you want the R/L ratio data, make sure to have the R and L paired in the 4iiii app before connecting to Wahoo Element

    • Power Meter City

      Hi Patrick. This is noted – thanks for this. Good luck on your rides! We hope you continue to enjoy your power meter and we are here if there is anything else we can do!

  5. Victor Dueñas (verified owner)

    It’s an excellent product, I already have it installed on the bicycle, connection with zwift by Bluetooh and with the garmin by ANT +

    • Power Meter City

      Hi Victor. Thanks for this amazing review on you 4iiii R7000 Dual sided. We hope you continue to enjoy them and let us know if there is anything else we can do!

  6. Michael

    Despite the item being back ordered they arrived shortly after the order was placed. Installation was easy and so far they have been working without any issues. It is recommended to calibrate them before each ride which only takes a few seconds. Seems like excellent value compared to other brands.

    • Power Meter City

      Hi Michael. Thanks for this kind review on your 4iiii R7000 Dual sided – we are happy it got delivered to you on time. We hope you continue to enjoy them and we are here if there is anything else we can do!

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