4iiii Precision 3 Powermeter Left Arm - Shimano Ultegra FC-R8100
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. 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.
Features
- APPLE FIND MY - Offering the peace of mind in knowing where your power meter is.
- BATTERY LIFE - With 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 travelled 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 Powermeter weighs about the same as a sip from your water bottle. 4iiii's 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.
- 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.
Technical details of the 4iiii Precision 3+ powermeter sensor
- power measurement: patented 3D measurement method from 4iiii
- accuracy: +/- 1 %
- power measurement range: 0 – 4000 W
- cadence range: 30 – 170 rpm
- battery life: up to 800 h (manufacturer's specification)
- battery type: CR2032 (coin cell)
- Wifi communication: ANT+ / Bluetooth
- status indication: LED indicator
- app compatibility: Apple Find My, Zwift, TrainerRoad, SYSTM, etc.
- temperature range: 0 – 50 °C (operation) / -40 – 60 °C (storage)
- protection class (waterproof): IPX7 certified
- height: 5.5 mm
- weight: approx. 9 g (powermeter without crank arm; manufacturer's specification)
How does it work?
A ready-to-ride PRECISION 3 powermeter comes pre-installed on a brand new Shimano crank arm, and you can start measuring power immediately after installation.
Important: You must make sure that there is enough space between the crank and the frame for the measuring unit.
What do I get?
Once your ready-to-ride PRECISION 3 Powermeter arrives, all you need to do is install it on your bike using the standard Shimano crankset installation procedure. Plug in a controller or computer, and you're ready to ride with power!
Warranty & Durability
Whether tested in Strade Bianche downpours, muddy Cross-Country mountain bike races, and even Oracle Team USA's America's Cup in the salty ocean spray, you can be sure your powermeter is as tough as you are. All 4iiii powermeters are IPX7 certified for immersion in water up to one meter and come with an industry-leading 3-year warranty.
Indoor Training
When the weather makes it difficult to ride outdoors, your 4iiii PRECISION 3 powermeter can be used with all the popular indoor training apps like Zwift, TrainerRoad, TheSufferFest, Rouvy and more. Simply connect your favorite app via ANT+ or Bluetooth Smart, put your bike on a trainer and ride!
Advantages of 4iiii power meter systems
3D power measurement | If force is applied to the pedals and correspondingly to the crank, there is not only a bending of the crank arms in one dimension – twisting and deformation processes take place in all 3 directions. 4iiii's patented 3D force measurement system measures this multi-dimensional loading, so no matter what the riding conditions or each rider's unique pedal stroke, performance data is always accurately determined.
Gold standard in precision | The accuracy of 4iiii powermeters has been tested and validated by leading scientists at the Locomotion Lab at the University of Colorado. With +/- 1 % precision, training, pacing and racing can be reliably planned with the assurance of consistent data.
Dual-channel ANT+ & Bluetooth Smart | In order for riders to read and record their performance data from a wide catalog of devices, sports watches, smartphones and computers, 4iiii powermeters are capable of transmitting their measurement results using both the widely used ANT+ technology and the Bluetooth Smart wireless standard. Accordingly, 4iiii powermeters are also compatible with all popular indoor training applications, such as Zwift, TrainerRoad, TheSufferFest, Rouvy, etc.
Warranty & durability | 4iiii powermeter technology has been proven in the toughest tests around the globe – whether it's sinking in the mud of Cross Country mountain bike races, on the rainy gravel roads of Strade Bianche, or even in the salty ocean spray of the America's Cup. All 4iiii powermeters are certified to IPX7 protection rating and accordingly suitable for immersion in water up to one meter. Since 4iiii is confident in the durable design of its products, the manufacturer offers a 3-year warranty.