The steering frame is absolutely essential in order to experience the interactive game element at its best. The Tacx Steering frame is compatible with any wired VR trainer (Fortius and i-Magic)Foldable design can be transported and stored easilyThe Steering frame is also compatible with the Flow trainers once the flow has been upgraded with the VR Head Unit and software - the upgrade is a necessary prerequisite in order for the steering frame to be compatible with the FlowRubber at the bottom side prevents the rider from moving and reduces noiseThe front wheel is put into a turntable plate and it doee not have to be removed from the bicycle