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 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.

Packaged into a durable, lightweight design and compatible with ANT and Bluetooth Smart head units, PRECISION will help you train harder and smarter.

A Ride Ready PRECISION includes and comes preinstalled on a brand-new Shimano crank arm of your choice. These crank arms will fit bottom brackets using the Hollowtech II interface.

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How Does It Work?

A ride-ready PRECISION pod is already preinstalled on a brand-new Shimano crank arm at our factory. The moment you order, our fulfillment team will get it on its way to you, and you should be able to ride with power as soon as it arrives.

In The Box

Once your ride-ready PRECISION 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!

Indoor Training

If the weather or climate makes riding outdoors tough, your 4iiii PRECISION powermeter can be used with all popular indoor-training apps, such as Zwift and TrainerRoad TheSufferFest, Rouvy, and more. Use your favorite app's connection procedure over ANT or Bluetooth Smart, put your bike on a trainer, and get riding!

Specifications

• Module Weight: 9g (0.3oz)
• Power Range: 0-4000W
• Cadence Range: 30-150RPM
• Communication Protocols: ANT , Bluetooth
• Operating Temperature: 0 to 50°C (32-122°F)
• Storage Temperature: -20 to 50°C (4-122°F)
• Battery Type: CR2032 lithium ion coin cell
• Battery Life: 100 hours
• Waterproof Rating: IPX7, IPX5
• Length: 37.7mm (1.5in)
• Width: 27.6mm (1.1in)
• Depth: 7.5mm (0.3in)

FEATURES:

• 3D POWER MEASUREMENT: When you put force through your pedals or crank, it doesn't just bend the crank - it twists and flexes in all three dimensions. 4iiii's patented 3D power measurement system measures this multidimensional strain, so you can be confident that your unique pedal stroke is still measured accurately no matter your riding conditions.
• INDUSTRY-LEADING ACCURACY: Our /- 1% accuracy isn’t just a claim; it’s been third-party tested and validated by leading scientists and the Locomotion Lab at the University of Colorado. You can plan your training, pacing, and racing with confidence, knowing that your data will always be consistent. Don’t limit your potential with unreliable data. Want to learn more? Read the whole whitepaper!
• DUAL-CHANNEL ANT & BLUETOOTH SMART: 4iiii Powermeters communicate their measurements over both the widely-used ANT and Bluetooth Smart radio standards, letting you read and record your power numbers on an enormous catalog of head units, sports watches, smartphones, and computers.