The invention describes a pivotable binding system (1) for mounting between a sports device (2) and a tread surface (5) for a user's foot, in which the tread surface (5) is pivotable about an axis extending more or less parallel with the ankle joint of the foot and is displaceable, at least in a part region assigned to the toes, to a position closer to the sports device (2), and can be joined to the sports device by at least one binding element (11). The binding element (11) is flexible and is resiliently deformable in a vertical plane (8).