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4iiii Precision 3 Powermeter Crankset - Ride Ready | Single Side (left) - Shimano Ultegra R8100

4iiii Precision 3 Powermeter Crankset - Ride Ready | Single Side (left) - Shimano Ultegra R8100

Used in the Tour de France for the attacks to Alpe D'Huez and in the Ironman World Championships on the Queen K, the PRECISION 3 powermeter provides industry-leading accuracy and reliability when you need it most. With patented 3D strain gauge technology, you'll have the confidence that the data you rely on will lead to your own yellow jersey.

The PRECISION 3 is packaged in a rugged, lightweight design and is compatible with ANT+ and Bluetooth Smart control devices. A ready-to-ride PRECISION 3 includes and comes pre-installed on a brand new Shimano crank arm. These crank arms fit Hollowtech II bottom brackets. Now new with longer battery life up to 800 hours and a lower overall height of 5.5 mm instead of the 7.5 mm of the previous model. In addition, a status LED has been integrated to see at a glance in which mode or state the device is currently.

Highlights of the 4iiii Left-Side Precision 3 power meter

  • PRECISION 3 Powermeter pre-installed on a new Shimano crank arm
  • Dimensions: 32 mm x 23 mm x 14 mm
  • Accuracy: +/- 1%
  • 3D power measurement
  • Status LED
  • Battery life: approx. 800 hours with CR2032 button cell (manufacturer's specification)
  • Connectivity: ANT+ / Bluetooth
  • Compatible with training apps like: Zwift, TrainerRoad, SYSTM, etc.
  • Backward compatible with Precision Drive Side Powermeter
  • Power measurement range: 0 - 4000 watts
  • Cadence range: 30 - 170 rpm
  • Operating temperature: 0 °C - 50 °C
  • Storage temperature: -40 °C - 60 °C
  • Water resistance: IPx7
  • Weight: 1200 g (only measuring units / manufacturer's specification)

Details about the 4iiii Left-Side Precision 3 crank arm with powermeter

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 have to do is install it on your bike using the standard Shimano crankset mounting 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!

Technical specifications of the 4iiii Left-Side Precision 3 Powermeters

  • Gold Standard for Precision
    The 4iiii power meter's accuracy has been independently verified by leading scientists at the Locomotion Lab at the University of Colorado to be +/- 1%. So you can plan your training, pacing and racing with confidence knowing the device is measuring your true performance.
  • Dual-Channel ANT+ & Bluetooth Smart
    4iiii power meters communicate their measurements via both widely used ANT+ and Bluetooth Smart wireless standards, so you can read and record your power readings on a huge catalog of endpoints, sports watches, smartphones and computers.
  • 3D Power Measurement
    When you apply force to pedals or crank, the crank doesn't just bend - it twists and flexes in all 3 dimensions. 4iiii's patented 3D force measurement system measures this multi-dimensional stress, so you can be sure that every single step is still accurately measured, no matter what the riding conditions.
  • 3 year warranty
    4iiii power meters are waterproof, durable, and designed to be accurate and precise even in the harshest conditions. That's why they come with an industry-leading 3-year warranty.

Included with

PRECISION 3 Ride Ready comes pre-assembled on a brand new Shimano crankset.

Fact Sheet of 4iiii Precision 3 Powermeter Crankset - Ride Ready | Single Side (left) - Shimano Ultegra R8100

Product Name: 4iiii Precision 3 Powermeter Crankset - Ride Ready | Single Side (left) - Shimano Ultegra R8100
Manufacturer: 4iiii
Item Code: VIE609571
activity: Cycling
material: Aluminium, Composite
usage bikesport: Road Bike
crank arm length: 165, 170, 175
shifting system: 12-speed
bottom bracket axle profile: 24mm Hollow Shaft
chainring mount: 2-speed
crank special features: Power Meter
Model year: 2023
Collection: Full year
Color: Black
weight: 1200g
manufacturer item code: PML300-S18A01J (165mm 50-34) |  PML300-S18A02J (165mm 52-36) | PML300-S18B01J (170mm 50/34) | PML300-S18B02J (170mm 52/36) | PML300-S18D01J (175mm 50/34) | PML300-S18D02J (175mm 52/36)
Weight Source: Manufacturer
Manufacturer page:
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