Hello Andrei

Basically, the pedals do not have to be mounted. The braking force can be adjusted with different springs (included) and can also be adjusted via the software. However, I doubt that this really works well in combination with an office chair. Something will slip or tip sooner or later.... I have mounted my T-LCM's on a Playseat Challenge. On the internet you can also find appropriate clamps to mount the pedals to the Playseat Challenge. I can fully recommend this "inexpensive" setup (compared to other sim rigs).