Replace the Belt on kBox3

When the drive belt on your kBox3 is damaged and cannot be trimmed, it needs to be replaced. Here’s how to fix it.

For trimming the damaged parts of the belt leaves a remaining belt that is too short, the belt needs to be replaced. Follow this procedure for the kBox3:


  • Verify that you have a replacement belt, or contact us to order.
  • Remove the Belt all the way from the shaft to the take-up spool (visible to the left part of the picture).
  • Detach the Belt from the take-up spool, and make sure the take-up spool is fixated so the spring doesn’t unwind and lose its tension since this can damage the spring.
  • Attach new Drive Belt to the take-up spool.
  • Reassemble the Belt all the way back to the shaft in the reverse order from when you removed it. Attach the Belt to shaft after you are certain that the Pulley is connected and the Belt isn’t twisted.





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


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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