The 4 mm disc set is very suitable for more intensity but also for quiet forms of movement and comes standard with the Kynett FIT and PRO Flywheel.
The resistance used to train is not expressed in kilograms but in a moment of inertia kgm2. Every object that rotates on a certain axis has a so-called moment of inertia. The moment of inertia can be calculated based on the mass and dimensions of the rotating disk.