Find Your Power

PRECISION 3+ Powermeter

Get ready to elevate your riding experience with the PRECISION 3+ Powermeter with Apple Find My. Delivering the same reliable and highly accurate power data you’ve come to expect from 4iiii, while providing the peace of mind that comes with knowing the location of your bike.

With up to 800 hours of battery life, an automatic terrain selector, +/-1% accuracy and backed by our industry-leading 3-year warranty, the PRECISION 3+ Powermeter will be your trusted tool for years to come.


  • Apple Find My

    Offering the peace of mind in knowing where your power meter is.

  • Battery Life

    With up to 800 hours of battery life, you won’t have to worry about changing your battery for years to come.

  • Accuracy in 3D

    With +/- 1% accuracy, 4iiii is the only crank-based power meter to use 3 strain gauges to measure all forces in your pedal stroke.

  • Automatic Terrain Selector

    Detects the terrain you’re riding on for more responsive cadence and power feedback/data. Ride the roads less traveled with confidence.

  • Ultra Low Profile

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

  • Light Weight

    At only 9 grams the Precision 3+ Powermeter weighs about the same as a sip from your water bottle.

  • Waterproof

    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.

  • 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.

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 and want to add power?

With our Factory Install option you can send your crank to us and we will install a 4iiii power meter on it.

With our Factory Install option you can send your crank to us and we will install a 4iiii power meter installed locally right here in the UK.


  • What’s new with PRECISION 3+?

    The ‘+’ is an evolution of our PRECISION 3 Powermeter and refers to the Apple Find My technology that is integrated in the power meter.

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

    The PRECISION 3+ Powermeter has all the features of the PRECISION 3, with the addition of Apple Find My technology. You still get highly accurate data within +/- 1%, up to 800 hours of battery life and our industry leading 3-year warranty, now with the peace of mind of Apple Find My.

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

    The PRECISION 3+ Powermeter comes as both a Ride Ready and Factory Install option. You can reference the list of Ride Ready cranks that are available here and a list of the cranks that are compatible for a Factory Install here.

  • Can I upgrade my PRECISION 3 to PRECISION 3+?

    If you purchased a left-side PRECISION 3 (non ’+’) Powermeter prior to the Apple Find My release, you can send us your power meter to have Apple Find My installed.

  • When will PRECISION 3+ be available for dual-sided?

    PRECISION 3+ will only be available on the left side PRECISION 3+ Powermeters. PRECISION 3+ PRO dual and right side power meters will be available in the near future. We are currently developing the next generation PRECISION 3+ PRO. Join our mailing list for the latest updates.

  • Is the previous generation PRECISION 3 still available?

    PRECISION 3 will continue to be sold while supplies last.

  • Is this feature available/compatible with Android phones?

    The Apple Find My feature is only compatible with Apple products.

  • How do I activate the Find My feature?

    You can activate the Apple Find My feature on the PRECISION 3+ Powermeter by performing a battery in out 3 times to enter into Find My pairing mode then continue through the Apple Find My App. For full instructions please view the full manual.

Key Specifications

Accuracy +/- 1%
Battery Type CR2032 Coin Cell
Battery Life Up to 800hrs
Waterproof Rating IPx7
Cadence Range 30 - 170RPM
Power Range 0 - 4,000W
Height 5.5mm
Weight 9g
Operating Temperature 0 - 50°C
Communication Protocols ANT+, Bluetooth

Shimano Safety Notice

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