Dual-Side PRECISION PRO Powermeter - Ride Ready

Dual Side Precision PRO Powermeter

Ride Ready
$619.99 USD

Used to pace attacks up the Alpe D’Huez in the Tour de France and to hammer on the Queen K during the Ironman World Championships, the PRECISION PRO Powermeter delivers industry leading accuracy and reliability when you need it most. Through our patented 3D Strain Gauge technology, you can be assured that the data you depend on will help lead you to your own Yellow Jersey.

The PRECISION PRO will allow you to view advanced metrics like left/right balance, pedal smoothness, torque effectiveness, and provide you with the most accurate power numbers during training and racing. Ridden by the top cyclists and triathletes in the world, the PRECISION PRO is the ultimate training tool to help you reach your goals.


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


  • Light Weight

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

  • 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.

  • Left Right Balance

    A dual power meter measures 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.

  • 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.


Specification Value
Module Weight Non-drive Side: 9g (0.3oz)
Drive Side: 16g (0.6oz)
Power Range 0 - 4,000W
Cadence Range 30 - 150RPM
Communication Protocols ANT+, Bluetooth
Operating Temperature 0 - 50°C (32 - 122°F)
Storage Temperature -20 - 50°C (4 - 122°F)
Battery Type CR2032 lithium ion coin cell
Battery Life 100+ hrs
Waterproof Rating IPx7, IPx5
Length 37.7mm (1.5in)
Width 27.6mm (1.1in)
Depth 7.5mm (0.3in)


A 4iiii PRECISION PRO power meter is available ready to ride on any of the crankset configurations listed below. If your desired crankset isn't listed, we may have other products that are compatible.

  • Shimano 105 FC-R7000
  • Shimano Ultegra FC-R8000
  • Shimano Dura-Ace FC-R9100
  • Shimano GRX FC-RX810
  • Shimano XTR FC-M9100
  • Shimano XTR FC-M9120


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


  1. Quickstart Guide
  2. Clearance Guide (Letter)
  3. Clearance Guide (A4)
  4. iOS App
  5. Android App

Customer Reviews

Based on 5 reviews
Erik S
Great powermeter

Purchased this meter and it shipped right away. I stuck with the default shipping and product arrived over a week before Canada post said it would. I bought it in the 53/39 configuration because the 50/34 was slow to come back in stock. Swapped over my chainrings from my original 105 R7000 crank and I was all set. Meter works great on my Garmin Edge 1030 plus. The power number lags behind the actual mechanical input by around 2 seconds, which seems reasonable.

Andrew Roerick
Awesome product at a price that doesn’t break the bank

Awesome power meter especially for the price! Gets the job done and hold a charge for a few hundred miles! Only wish it was easier to change battery or that we could charge it

Joshua Klingerman
Mike Rende is an a**hole

What an a**hole move to give a low rating on a product and company due to a problem that has nothing to do with the product. Mike should write a review on the Canadian Post office. Thanks for wasting everyone’s time, Mike Rende. You spoiled brat.

Mike Rende
Waiting on delivery. Slow shipping.

Can’t review a product that hasn’t been delivered. According to the Canada Post tracking, the package will arrive this Friday. I don’t think I’ve ever waited so long for a bike component that shipped from stock.

Hi Mike,
Thank you for your order. Unfortunately, it looks like your order went through some lasting delays travelling through British Columbia due to severe weather events and damage to shipping routes after major flooding in November. It has now made its way into the US and should be delivered in the next couple of days. If you have any other questions, please do not hesitate to reach out to our support team at 4iiii.com/support.
The 4iiii Team

Erin DeMarco
So far so good

Super easy to set up and install