The 4iiii Precision 3 Plus uses a three-strain-gauge system that measures forces across your entire pedal stroke rather than sampling at a single point. This approach captures the full picture of how you apply power to the crank, accounting for variations in pedal stroke mechanics that single-gauge systems miss. The measurement pod sits 5.5 millimeters off the crank arm, which keeps it clear of most frame configurations without requiring additional spacers or adjustments. Accuracy sits at plus or minus one percent, and the system performs zero-offset calibration before each ride to maintain consistency.

Battery life reaches 800 hours on a single coin cell, which translates to about a year of regular riding before you need to swap the battery. The pod carries an IPX7 waterproof rating, which means it handles submersion up to one meter for thirty minutes. You can ride through rain, cross streams, or pressure wash your bike without worrying about moisture intrusion. The housing uses a sealed design with an integrated LED indicator that shows power status, zero-offset confirmation, and low battery warnings.

The power meter transmits over both ANT+ and Bluetooth, so it works with most cycling computers, watches, and indoor training platforms. You can pair it to Wahoo, Garmin, or Hammerhead head units, and it connects directly to Zwift, TrainerRoad, or other training apps without requiring a separate bridge device. The Precision 3 Plus includes Apple Find My integration, which means you can track the location of your bike through the Find My app when the power meter is not actively transmitting power data. This works the same way an AirTag does but without needing to mount a separate device to your frame.... Read More