These drive belts are compatible with kBox3 and kBox4 flywheel training devices that have a built in auto-retract system.
The Drive Belt and its attachment to the axle is the most sensitive part of the kBox. Be attentive to wear and check regularly. When the Belt shows signs of wear and tear, trim the end by cutting off the damaged area or replace it with an original spare Drive Belt.
For guidance on how to replace your Drive Belt, please watch our tutorial.
kBox3 devices produced before April 2016 require another component for easier assembly.