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4iiii Ultegra R8100 Precision 3+ Pro Crankest PowerMeter
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4iiii Ultegra R8100 Precision 3+ Pro Crankest PowerMeter

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Mfg PartNum:
$949.99 set
MSRP: $949.99
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The Ultimate Power Tracker, Now With A Bike Tracker

Get ready to elevate your riding experience with the new 4iiii Ultegra R8100 PRECISION 3+ PRO Powermeter with Apple Find My. Delivering the same reliable and highly accurate power data you've come to expect from 4iiii, while enjoying the peace of mind that comes with knowing the location of your bike.

With advanced metrics such as left/right balance, pedal smoothness and torque effectiveness, the PRECISION 3+ PRO Powermeter provides the data you need for training and racing. With up to 550 hours of battery life, an automatic terrain selector, +/-1% accuracy and backed by our industry-leading 3-year warranty, the PRECISION 3+ PRO Powermeter will be your trusted tool for years to come.

Once your ride-ready PRECISION 3+ PRO 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.

  • Apple Find My compatible
  • +/- 1% accuracy with 3 strain gauges
  • Automatic Terrain Selector
  • Indicator Light
  • Up to 550 hours of battery life
  • Left/Right balance
  • IPX7 waterproof
  • 3-year warranty
  • Specs:

    • Type: Dual
    • Accuracy: +/- 1%
    • Battery Type: CR2032 Coin Cell
    • Battery Life: up to 550 hours
    • Waterproof Rating: IPx7
    • Cadence Range: 30 - 170 RPM
    • Power Range: 0 - 4,000 W
    • Height: 5.5mm
    • Weight: 29g
    • Operating Temperature: 0 to 50 °C
    • Communication Protocols: ANT+, Bluetooth

    B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

    Please note: This product ships signature required.


    165mm - 50/34t

    Mfg PartNum: PMD300-S18A01X 

    170mm - 50/34t

    Mfg PartNum: PMD300-S18B01X 

    172.5mm - 50/34t

    Mfg PartNum: PMD300-S18C01X 

    175mm - 50/34t

    Mfg PartNum: PMD300-S18D01X 

    165mm - 52/36t

    Mfg PartNum: PMD300-S18A02X 

    170mm - 52/36t

    Mfg PartNum: PMD300-S18B02X 

    172.5mm - 52/36t

    Mfg PartNum: PMD300-S18C02X 

    175mm - 52/36t

    Mfg PartNum: PMD300-S18D02X 

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