The invention relates to a torsion spring system for a wheel suspension of a motor vehicle, said torsion spring system having an actuator (28) that is provided on the vehicle body (26), variably prestresses the torsion spring system and acts, via a torsion bar (22) and an output lever (38), with a prestressing force on a wheel suspension element (12) of the wheel suspension. According to the invention, the torsion bar (22) is in two parts between said actuator (28) and said output lever (38) and has a first bar part (23) and a second bar part (25) coupled thereto with a spring element (16) connected in between said parts.