4iiii Precision 3+ Ultegra 8100 left crank with power meter

4iiii Precision 3+ Ultegra 8100 left crank with power meter

415.49 €

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8 Reviews

3 Questions

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Long

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Features of 4iiii Precision 3+ Ultegra 8100

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Specifications 4iiii Precision 3+ Ultegra 8100

Features of 4iiii Precision 3+ Ultegra 8100

Color Silver

Color

Silver

Sensor Type Power meters

Sensor Type

Power meters

Recommended Use Road Cycling

Recommended Use

Road Cycling

Product Type Cranks

Product Type

Cranks

Product description of 4iiii Precision 3+ Ultegra 8100 left crank with power meter

Description summary

Unlock your potential with the 4iiii Precision 3+ power meter, pre-installed on a Shimano Ultegra 8100 left crank. Trusted by pros, this ultra-light (9g) and compact unit delivers +/-1% accuracy and an industry-leading 800-hour battery life. Its automatic terrain selector provides responsive power data on any surface. More than just a power meter, it’s a training partner offering peace of mind with integrated Apple Find My support. With a 3-year warranty, it´s the reliable, accurate tool to chase your goals

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Our most powerful unit to date, compressed into a smaller, lighter package and featuring support for apple find my, the precision 3+ powermeter is a proven choice of pros and weekend warriors alike. 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 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. 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.

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.

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.

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 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. Our goal is to help you get faster, not to slow you down.

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.

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

Compatibility:
- A 4iiii PRECISION 3+ 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 Ultegra FC-R8100
- Shimano Dura-Ace FC-R9100
- Shimano Dura-Ace FC-R9200
- Shimano GRX FC-RX810
- Shimano XT FC-M8100
- Shimano XTR FC-M9100

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

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Manual

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What our customers are saying about 4iiii Precision 3+ Ultegra 8100 left crank with power meter

This 4iiii Precision power meter is praised for being accurate, reliable, and lightweight. Users find the single-sided power measurement provides sufficient data for gauging effort. Assembly and setup are straightforward, with the 4iiii app making calibration and firmware updates easy. A standout feature is the integrated Apple Find My function, which effectively acts as a bike tracker. It´s a highly recommended, functional potentiometer that just works

White ultegra 4iiii

2025/08/21

Santi

Everything is perfect as always on this site, now it's time to try it.

4iiii Ultegra power crank arm

2025/04/26

PHILIP

Excellent product and quick delivery. This is a great product for those wanting a power meter. Love it !!

Uncomplicated

2024/11/15

Stefan

I was able to test the power meter now. Assembly and setup was really straightforward. The 4iiii app works really easily for calibration and firmware updates. The only thing I needed to do was set up the Apple FindMy function several times, putting the battery in and out several times before pairing mode was activated. In the meantime, I had to reset the FindMy once using the app. Now it works. Great. The one-sided measurement is completely sufficient for me. Now in winter, however, you should also remember to calibrate before every ride - after briefly adjusting the power meter to the outside temperature (this can also be triggered on the Wahoo etc.).

Powermeter for real training

2024/10/31

Kmeco

I'm using 4iiii products for a several years on my bikes. They are light and reliable.

Perfect

2024/06/11

caodecaca

Excellent potentiometer. And with Apple functionality it got even better. I recommend. Great

4iiii power meter

2024/05/01

Erik

Had stages before, I like the functionality of this better, especially the “Find my” functionality to have it operate as an air tag for my bike. The power meter functions were great a expected.

Does what it says, no fuss.

2024/02/27

Marcus Le Count

It is great at what it does. I don't race and don't need all the bells and whistles of a dual sided PM. I just want to gauge my efforts and this does it effortlessly. Would defo recommend.

Excellent single sided power

2023/12/02

Matt

This is my second 4iiii Precision and I’m really pleased with it. It’s extremely accurate and incredibly light and just works. I suggest setting your head unit to 3 second average power, for best results. I especially like that the Precision now uses Spple find my phone, making it a proficient tracker, should your bike be stolen, Highly recommended!

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Ultegra R8000 Compatibility

2025/01/27

Luis

Hi. Is it compatible with ultegra r8000? Thanks

Answer of Dennis

Yes

Answer of Kerstin

Yes, fits 8000 and 8100

11 speed

2024/10/08

Rhys egan

I have a 11 speed shimano 105 will this crank fit

Answer of Conor

If it is Shimano 105 FC-R7000, then yes.

12 speed

2024/07/31

David

Does this fit 12 speed ultegra

Answer of Alexey

Yes. This is crank for ultegra DI2 12speed.

Answer of Marius

Yes, this crank is for 12-speed

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4iiii Precision 3+ Ultegra 8100 left crank with power meter

Features of 4iiii Precision 3+ Ultegra 8100

4iiii - Bike parts - Cranks

Specifications 4iiii Precision 3+ Ultegra 8100

Features of 4iiii Precision 3+ Ultegra 8100

Color Silver

Sensor Type Power meters

Recommended Use Road Cycling

Product Type Cranks

Product description of 4iiii Precision 3+ Ultegra 8100 left crank with power meter

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What our customers are saying about 4iiii Precision 3+ Ultegra 8100 left crank with power meter