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4iiii PRECISION Shimano GRX RX810 Power Meter

Niel Ubod July 22, 2021
5.00 out of 5 based on 7 customer ratings
(7 customer reviews)

$349.99

4iiii’s PRECISION power meter combined with Shimano’s GRX RX810 groupset

Clear selection

Description

4iiii PRECISION Shimano GRX RX810 Power Meter

Introducing the all new 4iiii PRECISION Shimano GRX RX810 Power Meter. 4iiii has combined their patent pending 3-D tri-axial strain gauge technology, measured at +/- 1.0% accuracy, with Shimano’s GRX RX810 groupset. The result is one of the lightest, most affordable and most accurate direct force power meters available for gravel and adventure riders.

The 4iiii power meter measures left leg power and doubles this value to determine your total power. This left-only design allows for a power meter that is affordable, lightweight and easy to install. The power meter adds only 9 grams to your crank arm and is installed in about 10 minutes. In addition, the PRECISION is compatible with both ANT+ and Bluetooth SMART devices. This means you can use it with your favorite bicycle computer, watch or smart phone.

 

Highlights

Most Affordable DFPM

The 4iiii PRECISION is one of the most affordable, ready to ride direct force power meters available.

High Level of Accuracy

The PRECISION is accurate to within +/- 1.0%. This compares to average accuracy of +/- 1.0-2.0% for most other power meters.

Lightest Power Meter

At only 9 grams of added weight, the PRECISION is the lightest power meter you can buy!

Easy to Install

Installation is a breeze. Just swap it out for your current left-side crank arm and you’re ready to ride! Installation takes minutes…not hours.

ANT+ & Bluetooth SMART

The power meter transmits data via both ANT+ and Bluetooth SMART so you can use it with a wide range of devices.

Options

The power meter is available in the following crank arm lengths:  170 mm | 172.5 mm | 175 mm

 

Compatibility

The 4iiii power meter is compatible with all Shimano GRX cranksets including GRX RX600.

Please note, this product requires a Shimano Crankarm Cap Tool (sold by us separately) for installation.

 

In the Box

  • 4iiii PRECISION Shimano GRX RX810 Power Meter
  • CR2032 Battery
  • Quick Start guide

 

4iiii PRECISION Shimano GRX RX810 Specs

Name4iiii PRECISION GRX RX810
Bike TypeGravel
Location of Power MeasurementCrank Arm
Left or Both Legs MeasuredLeft only
Independent Left/Right MeasurementNo
InstallationEasy
Communication ProtocolANT+ and Bluetooth SMART
Claimed Accuracy+/- 1.0%
Weight9 grams (added weight)
Battery TypeCR2032 coin cell
Battery Life100 hours
Method of Cadence MeasurementAccelerometer
Warranty3 years

CUSTOMERS ALSO VIEWED

7 reviews for 4iiii PRECISION Shimano GRX RX810 Power Meter

  1. Kim Hyunseung (verified owner)

    My second PM I bought here and I am very satisfied. Works well, perfectly fits with my Giant Revolt. Thanks for caring, have a nice day!

    • Power Meter City

      Thank you for the loyalty and kind review Kim – we really appreciate it! We hope you will enjoy your 2nd power meter (Good choice BTW!) Let us know if there is anything else we can do! Ride safe!

  2. Takaaki Takuma (verified owner)

    This is the third Power Meter by me. One STAGES and two 4iiii. 4iiii is awesome PM. High stability and accuracy, water registance. If I buy one more PM again, absolutely will chose 4iiii.
    Power Meter City is reliable shop, because quick shipping and send me emails when I need.

    • Power Meter City

      Hi Takaaki. Thanks for this kind review – we really appreciate it. We hope you will continue to enjoy your new power meter. Please let us know if there is anything else we can do!

  3. Trevor (verified owner)

    As all the other reviews say… great customer service. Arrived within a week in Australia, faster than what local post could achieve….
    Easy to install, calibrate and start using. Great communication from ordering, shipping through to delivery… and excellent support followup as well.
    Definitely recommend purchasing from Power Meter City!

    • Power Meter City

      Hi Trevor. Thanks for this kind review! We are glad you finally have your power meter – good luck on your future rides. We are here if there is anything else we can do!

  4. Nerio (verified owner)

    Excellent product, and superb customer service from Powermetercity. Arrived within 3 business days (earlier than expected) even despite shipping all the way to Singapore during the current pandemic.

    Purchasing this has been a hassle free experience, and all my questions were answered promptly by using the chat feature on the site. Furthermore, Powermetercity is the only place which had this in stock.

    Lastly, the product itself has been faultless. Works really well, great app support, and does the job!

    • Power Meter City

      Nice! Thanks for this Nerio. We are glad it came fast despite the current situation. Good luck on your future rides! We are here if there is anything else we can do!

  5. Thomas Coleman (verified owner)

    Good price and good quality equipment

    • Power Meter City

      Hi Thomas. Thanks for this awesome review on your 4iiii PRECISION Shimano GRX RX810 Power Meter. We hope you will continue to enjoy them and we are here if there is anything else we can do!

  6. Philip Gray (verified owner)

    This was my first purchase from Power Meter City and I was not disappointed! Super fast shipping, I was installing the power meter to my bike in less than a week after purchase, which is pretty good as I am in New Zealand. Great communication and follow up emails offering post purchase support, if only more companies offered this level of customer care!

    • Power Meter City

      Hi Philip. Thanks for this kind review on your 4iiii PRECISION Shimano GRX RX810 Power Meter. Good choice for your first power meter! We hope you will continue to enjoy them! We also want to thank you for being a great customer! Let us know if there is anything else we can do!

  7. Michael Brannon

    This is my 2nd 4iiii power meter purchased from power meter city. I had a problem with this model, and Josh from pmc shipped me a new one out, pronto! PMC has the best customer service that I’ve dealt with recently. I’ll definitely be purchasing all my power meters from Power Meter City

    • Power Meter City

      Hi Michael. We really appreciate this and thank you for being a great customer. We hope you will enjoy your new 4iiii PRECISION Shimano GRX RX810 Power Meter. Please let us know if there is anything else we can do!

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