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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. Zachary Boivin (verified owner)

    First off, Power Meter City is awesome. I had to reach out to support prior to purchasing and they were fast and very helpful. Shipping was also very speedy. With regard to the power meter itself… I wanted to wait at least a month before reviewing to make sure I could provide the most accurate review. Removal of the old crank arm and installing the new is simple. If I can do it, you can as well. Pairing and calibrating is super easy. I have had zero connectivity issues with multiple applications. This is a solid product, priced very well, and if used properly, will make your training incredibly meaningful.

    • Power Meter City

      Hi Zachary. Thanks for this review! We hope you will enjoy those and yes – let us know in a month again. We are here if there is anything else we can do!

  2. Clive Rudd (verified owner)

    The PM arrived 2 days earlier which was a great surprise. It is working like a clock!

    • Power Meter City

      Hi Clive. Thanks for the kind review on your 4iiii R7000 Power Meter. We are here if there is anything else we can help you with!

  3. Al (verified owner)

    Factory fresh Shimano 105 Left Crank with Power Meter, very professional sensor, one for one swap, linked up immediately. I recommend this product!

    • Power Meter City

      Hi AI. Thank you for this amazing review. We are glad you like your 4iiii R7000 and we hope you continue to enjoy them and please let us know if there is anything else we can do!

  4. Bryan (verified owner)

    Great power meter for the price! Set up is super simple, calibrate it, and you’re on your way. The only other power meter I have to compare it against is the built in power meter in my wahoo Kickr, and they’re usually within a couple watts of each other. I was on the fence between stages and 4iiii, I’m really glad I got this one, very solid unit.

    • Power Meter City

      Hi Bryan. Thank you for this awesome review on your 4iiii PRECISION R7000. We are glad you liked it and we hope you continue to enjoy them. We appreciate your business and please let us know if there is anything else we can do!

  5. Gabriel (verified owner)

    Great product, works well, super easy to install.
    Very quick shipping and cx service answers quickly as well!

    • Power Meter City

      Hi Gabriel. We’re glad to hear you are enjoying your 4iiii R7000. Thank you for your business and please let us know if you need anything else.

  6. Babak Mansouri (verified owner)

    This is my first power meter and i am so happy training with one. It is as light as it can be and according to tests one of the most accurate crank arms power meters. I am glad i ordered from power meter city. I ordered it on Friday and received it on Monday with free shipping and I live on east coast I believe it was shipped from California.

    • Power Meter City

      Hi Babak, good choice on your first power meter and thank you for kind review. We hope you will continue to enjoy it and are here if there is anything else we can do.

  7. C G (verified owner)

    I am glad that I found this site. Their products and services were in tune with my needs. I needed a good, affordable power meter and good customer service. To be fair the customer service ended up being excellent. It was easy to install and it is recording data. The rest is up to me. I have marked the site for future shopping.

    • Power Meter City

      Hi CG. Thanks for the kind review – that made our day! We are here if there is anything else we can help you with.

  8. Christian Fredrickson (verified owner)

    Great product. Easy to install. Fast shipment. Now I have one on both my bikes.

    • Power Meter City

      Hi Christian. We’re glad to hear you are enjoying your 4iiii R7000. Thank you for your business and please let us know if you need anything else.

  9. Andrew O’Neill (verified owner)

    I’m very happy with this power meter the installation and setup only took a few minutes. I think this power meter works as well as the more expensive unit I have on my other bike.

    • Power Meter City

      Hi Andrew. Thanks for the review of your 4iiii R7000 power meter. It’s a great unit for the money. Keep up the good work and let us know if you need anything else!

  10. Ricky (verified owner)

    This power meter works like a charm. Installation and setup was a breeze. Have used the power meter on several rides and the results seem to be consistent with numbers from the PowerTap I use on my other bike. I use this on a bike for which I have multiple wheelsets and tire sizes. It really works great and allows me to access power data whether I am on the road or riding gravel. I highly, highly recommend this power meter.

    • Power Meter City

      Hi Ricky. Your review put a smile on our face! We’re happy to hear your 4iiii R7000 is getting the job done nicely for you. Keep up the good work!

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