A running gear unit, in particular for a rail vehicle, comprising - a wheel unit (105; 205; 305), - a first torsional vibration reduction mass unit, and - a second torsional vibration reduction mass unit; - said wheel unit (105; 205; 305) comprising a wheel unit shaft (105.1) and at least one wheel (105.2), - said wheel unit shaft (105.1) defining an axis of rotation (105.3), said axis of rotation (105.3) defining an axial direction and a radial direction of said wheel unit (105; 205; 305) as well as a torsional direction about said axis of rotation (105.3); - said wheel (105.2) being coupled to said wheel unit shaft (105.1) in a torsionally rigid manner about said axis of rotation (105.3) and being configured to run on a track; - said first torsional vibration reduction mass unit comprising a first torsional vibration reduction mass (108.1) coupled to said wheel unit (105; 205; 305) in a torsionally compliant manner about said axis of rotation (105.3); - said second torsional vibration reduction mass unit comprising a second torsional vibration reduction mass (109.1) coupled to said wheel unit (105; 205; 305) in a torsionally compliant manner about said axis of rotation (105.3); - said first torsional vibration reduction mass (108.1) and said second torsional vibration reduction mass (109.1) each being configured to oscillate about said axis of rotation (105.3) in counter-phase with respect to a component of said wheel unit (105; 205; 305), in particular, with respect to said wheel (105.2), to reduce torsional vibration of said wheel unit (105; 205; 305); - said wheel unit having an unworn state in which said wheel unit has a torsional vibration resonant frequency, - said first torsional vibration reduction mass unit defining a first reduction resonant frequency of said counter-phase oscillation of said first torsional vibration reduction mass (108.1); characterized in that - said first reduction resonant frequency is located in the area of said torsional vibration resonant frequency of said wheel unit in said unworn state, and - said second torsional vibration reduction mass unit defines a second reduction resonant frequency of said counter-phase oscillation of said second torsional vibration reduction mass (109.1), which is of the same order as said first reduction resonant frequency and has an intentional offset from said first reduction resonant frequency, said intentional offset exceeding an offset caused by maximum manufacturing tolerances defined for said wheel unit. - a wheel unit (105; 205; 305), - a first torsional vibration reduction mass unit, and - a second torsional vibration reduction mass unit; - said wheel unit (105; 205; 305) comprising a wheel unit shaft (105.1) and at least one wheel (105.2), - said wheel unit shaft (105.1) defining an axis of rotation (105.3), said axis of rotation (105.3) defining an axial direction and a radial direction of said wheel unit (105; 205; 305) as well as a torsional direction about said axis of rotation (105.3); - said wheel (105.2) being coupled to said wheel unit shaft (105.1) in a torsionally rigid manner about said axis of rotation (105.3) and being configured to run on a track; - said first torsional vibration reduction mass unit comprising a first torsional vibration reduction mass (108.1) coupled to said wheel unit (105; 205; 305) in a torsionally compliant manner about said axis of rotation (105.3); - said second torsional vibration reduction mass unit comprising a second torsional vibration reduction mass (109.1) coupled to said wheel unit (105; 205; 305) in a torsionally compliant manner about said axis of rotation (105.3); - said first torsional vibration reduction mass (108.1) and said second torsional vibration reduction mass (109.1) each being configured to oscillate about said axis of rotation (105.3) in counter-phase with respect to a component of said wheel unit (105; 205; 305), in particular, with respect to said wheel (105.2), to reduce torsional vibration of said wheel unit (105; 205; 305); - said wheel unit having an unworn state in which said wheel unit has a torsional vibration resonant frequency, - said first torsional vibration reduction mass unit defining a first reduction resonant frequency of said counter-phase oscillation of said first torsional vibration reduction mass (108.1); - said first reduction resonant frequency is located in the area of said torsional vibration resonant frequency of said wheel unit in said unworn state, and - said second torsional vibration reduction mass unit defines a second reduction resonant frequency of said counter-phase oscillation of said second torsional vibration reduction mass (109.1), which is of the same order as said first reduction resonant frequency and has an intentional offset from said first reduction resonant frequency, said intentional offset exceeding an offset caused by maximum manufacturing tolerances defined for said wheel unit.