Home Products Power Meters PRECISION 3+ Powermeters
PRECISION 3+ Left-Side Powermeter - Ride Ready

Non-Drive SidePRECISION 3+Powermeter

Ride Ready

The 4iiii PRECISION 3+ Powermeter is the ultimate combination of accuracy, durability, and lightweight design. Whether you are a Tour de France pro, a Mountain Bike World Champion, Ironman triathlete, a Zwift racer, or a cyclist simply looking to add the structure of data to your training, this crank-based power meter provides the consistent data you need to unlock your potential.

Engineered to be the best affordable power meter on the market, the PRECISION 3+ features Apple Find My technology, allowing you to track your bike’s location with ease. With +/-1% accuracy, automatic terrain selection, and an industry-leading 800-hour battery life, it is built to handle everything from rough terrain and gravel to high RPM sprints.

This Ride Ready unit comes pre-installed on a brand-new Shimano crank arm, simply swap your left-side crank and start training. Backed by our 3-year warranty and an IPX7 waterproof rating, the PRECISION 3+ is your dedicated performance tool for years to come.

BONUS: FREE TRAINING WITH JOIN CYCLING. Every 4iiii power meter purchase includes 8 weeks of free premium training on the JOIN Cycling App. Whether you’re prepping for a local Gran Fondo or aiming for a new FTP personal best, JOIN provides flexible, adaptive training plans that sync perfectly with your new PRECISION 3+ data.

Winner of:

Shop Now:

Details

How does it work?

The PRECISION 3+ Powermeter is so much more than a power meter. It’s your training partner that offers peace of mind. While you are riding, your PRECISION 3+ Powermeter will transmit watts, cadence, and calories to your head unit of choice. While the power meter is not in use, Find My is enabled and allows you to see its location on a map. You can add your power meter to the Find My app and locate it on an iPhone, iPad, Mac or using the Find Items app on an Apple Watch.

In the Box

Once your ride-ready PRECISION 3+ Powermeter arrives, it just needs to be installed on your bike using the standard Shimano crank installation process. Connect a head unit or computer, and you can start riding with power. Connect to the Find My app with your iPhone or iPad to start tracking your power meter.

Warranty & Durability

Ridden through rain storms at Strade Bianche, mud filled cross country mountain bike races, and even tested amidst the salt spray of the ocean on Oracle Team USA’s America’s Cup competitors, you can be assured that your 4iiii power meter will be as tough as you are and is backed with an industry-leading 3 year warranty. All 4iiii power meters are IPX7-rated for water immersion up to one meter and backed with an industry-leading 3 year warranty.

  1. 4iiii Warranty Policy

Features

  • 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.

  • 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.

  • Light Weight

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

  • 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.

Specifications

Feature PRECISION 3+
Type Non-Drive Side
-
CR2032 Coin Cell
up to 800 hrs
IPx7
Cadence Range 30 - 170 rpm
Power Range 0 - 4,000 W
5.5 mm
9 g
Operating Temperature 0 - 50 ºC
Storage Temperature -40 - 60 ºC
IPX5
Protected against low pressure water stream from any angle.
IPX7
Withstands incidental exposure to water of up to 1 meter for up to 30 minutes.

Apple Find My

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

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.

Left Right Balance

Dual power meters measure the power from each individual leg to calculate your total power output.

Cycling Metrics

Get more data like pedal smoothness and torque effectiveness to analyze and optimize your pedal stroke.

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.

Battery Life

Our products’ impressive long-lasting battery life means you won’t have to worry about frequent battery changes.

With an ultra low profile design, your 4iiii power meter is compatible with more bike frames than ever before.

Light Weight

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

4iiii power meters communicate their measurements over both ANT+ and Bluetooth, letting you read and record your power numbers on an enormous catalog of head units, sport watches, smartphones, and computers.

Indoors

If the weather or climate make riding outdoors tough, your 4iiii power meter can be used with all popular indoor-training apps, such as Zwift, TrainerRoad, Wahoo SYSTM, Rouvy, and more. Simply use your favourite app’s connection procedure over ANT+ or Bluetooth Smart, put your bike on a trainer, and get riding!

  1. Indoor Training

Resources

  1. User Manual
  2. Frame Clearance Guide
  3. iOS App
  4. Android App
Find a Dealer
Locate a dealer or retail partner near you.
Dealer Locator
Watts Going On?
Subscribe to our newsletter for the latest products, exclusive giveaways and more.
Sign Up
Help Center
Need more info? Have a question for us? We’re here to help.
Learn More

Choose your region: