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

The kMeter system is developed specifically to accurately monitor power and energy as well as estimate force during flywheel training on the kBox. It is used by coaches and physiotherapists as well as directly by athletes and patients.

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 kMeter Module connected to the kBox, and a free to download app:

kMeter App

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

Read more and download the app here.

kMeter Module

The only thing you need beyond the app is the kMeter Module, which is a Bluetooth transmitter that connects to the rotational sensor under the kBox and transmits the signal to your mobile devices.

The kMeter Module is easily installed and is battery powered for complete mobility and ease of use. It can be connected to an unlimited number of mobile devices, so each user of a kBox can keep track of their own development.

The kMeter Module is compatible with all kBox models that have a sensor connector installed.

Learn more about the kMeter Module here.

Further reading


References from Twitter



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The Newest model, the kBox4 Active is built on proven, reliable technology. The perfect tool in strength and rehabilitation at our lowest price point.

  • Newest Model
  • Holds 1-2 Flywheels
  • kMeter Compatible
  • Weighs 15 kg
  • Starting at €1 410 / $1 585
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kBox4 Lite

Often chosen for its smaller foot-print, the kBox4 Lite model is of a lower weight, portability and not to mention its competitive entry cost level.

  • Portability
  • Holds 1-4 Flywheels
  • Built in kMeter
  • Weighs 9.5 kg
  • Starting at €2 300 / $2 575
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kBox4 Pro

The kBox4 Pro is our premium model with the greatest versatility. It’s ideal for sports teams and larger training and physiotherapy facilities.

  • Largest Floor Space
  • Holds 1-4 Flywheels
  • Built in kMeter
  • Weighs 15.5 kg
  • Starting at €2,990 / $3,345
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The kPulley is the ideal horizontal solution for improving strength by offering flywheel training for rotational and pull exercises.

  • Horizontal Model
  • Holds 1-2 Flywheels
  • Built in kMeter
  • Easy to assemble
  • Starting at €1 750 / $1 955
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