4iiii Precision Shimano GRX-810 dual Power meter

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The 4iiii R8000 power meter is a lightweight design and adds only 9 grams to the standard Shimano crank. This makes it the lightest power meter on the market. The power meter has a very accurate measurement with only +/-1% deviation. The 4iiii R8000 power meter determines your total power, but is based on the power that’s generated by your left leg. 

The 4iiii R8000 power meter can be installed easily, and the configuration is done with 4iiii Device Configuration. This app is available for Android and iOS. With this app, you can also check the state of the CR2032 button cell battery. This battery lasts for more than 100 hours of riding. The power meter unit weighs only 9 grams and the measurement deviation is only +/- 1%.


4iiii wattmåler Precision 2
4iiii left or dual powermeter Singleside powermeter
4iiii - Batteritype Battery Cr2032