An identical feature of all models is the assumption of a constant speed of rotation of the disk or plate. This is based on the fact that the speed of the vehicle can be considered as constant and the rigid rim yields a constant speed of rotation of the brake disk. In the context of lightweight design rims this assumption should be questioned, since the connectionbetween the hub and the outer rim is rather soft. Moreover the safety-relevant failures and possible fatigue are related to large rotational displacements between the hub and the outer rim. A first minimal model for brake squeal of vehicles with lightweight design rims thus should contain the excitation mechanism of [8] and also allow for the flexible connection between the hub and the outer rim.