kMeter II

$ 440 excl. tax

The Exxentric kMeter II is our wireless science-based feedback system for flywheel training.

The certified kMeter II comes built-in with all LegExx, LegFlexx, kPulley2, kBox4 Pro and kBox4 Lite devices. It is also available for purchase as an add-on to the kBox4 Active.

The kMeter II system is developed specifically to accurately monitor power and energy as well as estimate force during strength training on select models in our series of Flywheel Training equipment. It is used by coaches and physiotherapists as well as directly by athletes and patients.

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SKU: 20002 Categories: , ,



The system measures the rotation of the flywheel wirelessly with high accuracy and uses a smartphone app with a simple and accessible interface to present key training results, including:

  • Concentric and eccentric power
  • Range of motion
  • Force
  • Eccentric overload
  • Energy expenditure

The kMeter system consists of two parts: the wireless transmitter connected to the kBox and its corresponding app:

Exxentric App

The Exxentric App can be downloaded for free and installed by every user of a LegExx, LegFlexx, kPulley2, or kBox equipped with the kMeter Module. Users can monitor the results directly on their mobile devices and are able to save, browse, share or even export to excel for analysis.

Read more and download the app here. Further supporting material can be found here.


The latest version of the kMeter stands out for its remarkable ability to sample data up to rotational speeds of 155 revolutions per second. It has a sample rate of 10000 Hz and it receives 64 impulses per revolution of the flywheel.

Additional information


kBox4 Pro, kBox4 Lite, kPulley2, LegExx

Available for

kBox4 Active


LegExx, kPulley2, kBox4 Active and all kBox4 Lite & kBox4 Pro devices produced since May 2018

Sample rate

10000 Hz (155 revolutions/second)

SKU 20002