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4iiii Ultegra R8100 Precision 3+
4iiii Shimano GRX RX810 Precision 3+
4iiii 105 FC-R7000 Precision 3+
4iiii Shimano XT M8100 Precision 3+
4iiii Dura-Ace R9200 Precision 3+
4iiii power meter
4iiii is a manufacturer of power meters and accessories from Canada. In 2015, 4iiii released the PRECISION Left Side power meter. Using patented 3D strain gauge technology, it was able to measure three aspects of pedal stroke. In 2016, 4iiii entered the pro peloton with the launch of the PRECISION PRO Dual Sided power meter. Until 2018, Etixx Quick Step was sponsored to ride with 4iiii power meters. In addition to Etixx Quick Step, Bora Hansgrohe was also sponsored and raced with 4iiii technology from 2017 to 2019. Bora collected 73 victories, including Peter Sagan's legendary performance at Paris-Roubaix and his 2017 world championship win, while riding with a 4iiii power meter.
4iiii Precision 3 power meter
4iiii builds single- and double-sided power meters. The latest generation - the 4iiii Precision 3 power meter - is a single-sided power meter for Shimano cranks (105, Ultegra, Dura Ace, XT & GRX). It measures the power on the left crank arm. The powermeter itself weighs only 9g and has a high accuracy of ±1%. The battery has a record-breaking operating time of 800 hours. The 4iiii Precision 3 power meter also has built-in cadence measurement and active temperature compensation. It is easy to switch between bikes and is compatible with ANT+ and Bluetooth. The 4iiii Precision 3 power meter is permanently attached to the left crank arm. To change the crank arm, a TL-FC16 tool is required in addition to an Allen key.