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After a while, the drive belt on your kBox may need a trim or replacement. Here’s how to fix it.

Check Regularly

The drive belt and its attachment to the shaft is the most sensitive part of the kBox and kPulley. Be attentive and check regularly for signs of wear and tear.

Trimming the Belt

If damage occurs close to the end of the belt, you need to trim the belt by cutting off the damaged end and reattach the new end. Read the trimming guide for the kBox4 or kBox3 (also relevant for the kPulley2).

Replacing the Belt

If trimming the damaged parts of the belt leaves a remaining belt that is too short, the belt needs to be replaced. Read the replacement guide for the kBox4 or kBox3 (also relevant for the kPulley2).

Tightening Screws and Nuts

Most kBox devices are put under a lot of force and some vibrations, and on the kBox4 we recommend that screws and nuts are checked and tightened regularly, at least once a month. Watch our video guide for the kBox4.


Contact us or your reseller for help, or go back to support.


kBox4 Active

Our entry level model for the serious personal trainer or demanding home user. The perfect tool in strength and rehabilitation at our lowest price point.

  • Entry Level Model
  • Holds 1-2 Flywheels
  • kMeter Compatible
  • Weighs 15 kg
  • Starting at €1 410 / $1 635
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kBox4 Lite

Offers the lowest weight and best portability which makes it perfect for frequent travel without compromising the training.

  • Enhanced Portability
  • Holds 1-4 Flywheels
  • Built in kMeter
  • Weighs 9.5 kg
  • Starting at €2 300 / $2 665
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kBox4 Pro

Our premium kBox model with the greatest versatility and largest performance area. It’s ideal for sports teams, premium fitness clubs and physiotherapy facilities.

  • Largest Performance Area
  • Holds 1-4 Flywheels
  • Built in kMeter
  • Weighs 15.5 kg
  • Starting at €2 990 / $3 465
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The kPulley2 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 €1 890 / $2 190
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