Whether you’re fighting for a Kona qualification spot, logging countless hours on virtual riding platforms or looking to better your time up the local KOM segment, you want accurate and reliable tools to unlock your potential. With 800 hours of battery life, +/-1% accuracy and backed by our industry-leading 3-year warranty, the PRECISION 3 Powermeter will be your trusted tool for years to come.

  • +/- 1% Accuracy

    Everyone has a unique pedal stroke. Our patented 3D strain gauge measures all forces to deliver PRECISION accuracy.

  • Up to 800 hr Battery Life

    You won’t have to worry about changing your battery for years to come.

  • 9g Weight

    4iiii makes the lightest power meter on the market. We’re committed to helping you get faster, one gram at a time.

Ride Ready or Factory Install?

Want the power to ride right away? Choose between a variety of Shimano left-sided cranks with a 4iiii power meter pre-installed and ready to ride. Have an existing crank that you would like a power meter on? With our Factory Install option you can send your crank to us and we will install a 4iiii power meter on it. Not sure what works best? Let us help you choose.

Key Features

  • Accuracy in 3D

    Accuracy in 3D

    Not everyone has the perfect pedal stroke. With +/- 1% accuracy, 4iiii is the only crank-based power meter to use 3 strain gauges to measure all forces in your pedal stroke.

  • Ultra Low Profile

    Ultra Low Profile

    With an ultra low profile design, the PRECISION 3 is compatible with more bike frames than ever before.

  • Indicator Light

    Indicator Light

    At a glance, you can now see when your power meter has turned on, performed a successful Zero-offset, or has a low battery. Although, don’t expect to see that low battery indicator for a while!

  • Waterproof


    Based in the foothills of the Canadian Rockies, we were tired of training tools not designed to work in our tough environment. With an IPX7 waterproof rating you can be assured that your power meter can handle the toughest conditions.

  • ANT+ and Bluetooth

    ANT+ and Bluetooth

    Get the same numbers training inside and outside. The PRECISION 3 Powermeter is both ANT+ and BLE compatible so you can use it on your preferred head unit and favorite indoor training app.

  • 3-Year Warranty

    3-Year Warranty

    A lot can happen in 3 years. You probably won’t need to use it, but it’s reassuring to know that all 4iiii power meters are backed by an industry leading 3-year warranty.

Key Specifications

Accuracy +/- 1%
Battery Type CR2032 Coin Cell
Battery Life Up to 800<abbr title="hours">hrs</abbr>
Waterproof Rating IPx7
Cadence Range 30 - 170<abbr title="rotations per minute">rpm</abbr>
Power Range 0 - 4,000<abbr title="Watts">W</abbr>
Height 5.5<abbr title="millimeters">mm</abbr>
Weight 9<abbr title="grams">g</abbr>
Operating Temperature 0 - 50<abbr title="Celsius">°C</abbr>
Communication Protocols ANT+, Bluetooth


  • What’s new with PRECISION 3?

    The PRECISION 3 offers up to 800 hours of battery life, the longest lasting coin cell or rechargeable power meter on the market. At 5.5mm high, the PRECISION 3 is compatible with almost every bike frame on the market! The indicator light will let you know when your power meter is on, performed a successful zero-offset, and is ready for its battery to be changed.

  • What is the same between PRECISION 3 and the previous generation of PRECISION?

    Our patented 3D strain gauge technology that delivers 1% accuracy, our legendary 3 year warranty, and our commitment to making power accessible to all cyclists by delivering an excellent product at an excellent price.

  • Which cranks are compatible with PRECISION 3?

    We currently offer Ride Ready PRECISION 3 Powermeters on Shimano cranks. If you ride a non-Shimano crank or we are out of stock, check out our factory install option. Still don’t know what to choose? Click here to let us help you choose what power meter will work best for you.

  • Is PRECISION 3 compatible with current generation PRECISION?

    At this time, the PRECISION 3 is only available as a left sided only option. The PRECISION 3 will be backwards compatible. Sign up for the latest updates.

  • When will PRECISION 3 be available for dual-sided/right-side cranks?

    We are currently developing the next generation PRECISION 3 Pro. Join our mailing list for the latest updates.

  • Is the old PRECISION Powermeter still available?

    You can now get the last generation PRECISION Powermeter at an even better price! Check out the pricing and availability.

Update for US Customers — Reese’s Law

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