Crank arm power meter review

Installing and using the 4iiii Precision Powermeter

Aug. 28, 2019 - Willem L. Middelkoop

After I created a minimal road bike, I decided to install a power meter to find out what's it like to measure the power output of my legs. What can you learn from a power meter? Is it difficult to install? Is it worth it? Read along to find out.

Make sure the battery is installed and the covering door is locked

Tightening the crank arm using a torque wrench

You should be able to loosen the plastic cap with just your fingers/hand, no extreme torque is required

Use a crank tool to remove the crank (Shimano TL-FC16 / FC-M960)

Zero offset calibration is very important for accurate measurements

Wahoo RFLKT+ showing realtime data from my bike computer app - obviously I was standing still here... all the zero's (except my heart rate)

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