A running gear unit for a rail vehicle, comprising - a running gear frame unit (104; 204; 404; 504), - a traverse unit (109; 209; 409; 509), and - a suspension unit (106; 206; 306; 406; 506), in particular, a secondary suspension unit (106; 206; 306; 406; 506); - said running gear frame unit (104; 204; 404; 504) being configured to be supported on at least one wheel unit and defining a longitudinal direction, a transverse direction and a height direction; - said traverse unit (109; 209; 409; 509) being configured to support a wagon body (101.1) unit of said rail vehicle; - said suspension unit (106; 206; 306; 406; 506) suspending said traverse unit (109; 209; 409; 509) to said running gear frame unit (104; 204; 404; 504); - said suspension unit (106; 206; 306; 406; 506) comprising at least one spring unit (110; 210; 310; 410; 510) and at least one pendulum unit (111; 211; 311; 411; 511) arranged kinematically in series in a force flux between said running gear frame unit (104; 204; 404; 504) and said traverse unit (109; 209; 409; 509); - said at least one pendulum unit (111; 211; 311; 411; 511) having a first end section with a first articulation (111.3; 211.3; 311.3; 411.3; 511.3) associated to said running gear frame unit (104; 204; 404; 504) and a second end section with a second articulation (111.4; 211.4; 311.4; 411.4; 511.4) associated to said traverse unit (109; 209; 409; 509); - said first articulation (111.3; 211.3; 311.3; 411.3; 511.3) and said second articulation (111.4; 211.4; 311.4; 411.4; 511.4) allowing relative motion between said running gear frame unit (104; 204; 404; 504) and said traverse unit (109; 209; 409; 509) in said transverse direction and/or in said longitudinal direction by a pendulum motion of said pendulum unit (111; 211; 311; 411; 511); characterized in that - said first articulation (111.3; 211.3; 311.3; 411.3; 511.3) and/or said second articulation (111.4; 211.4; 311.4; 411.4; 511.4) is formed by said at least one spring unit (110; 210; 310; 410; 510) in that a longitudinal elasticity of said at least one spring unit (110; 210; 310; 410; 510) along a spring unit longitudinal axis of said at least one spring unit (110; 210; 310; 410; 510) provides a tilt axis of said pendulum unit (111; 211; 311; 411; 511). - a running gear frame unit (104; 204; 404; 504), - a traverse unit (109; 209; 409; 509), and - a suspension unit (106; 206; 306; 406; 506), in particular, a secondary suspension unit (106; 206; 306; 406; 506); - said running gear frame unit (104; 204; 404; 504) being configured to be supported on at least one wheel unit and defining a longitudinal direction, a transverse direction and a height direction; - said traverse unit (109; 209; 409; 509) being configured to support a wagon body (101.1) unit of said rail vehicle; - said suspension unit (106; 206; 306; 406; 506) suspending said traverse unit (109; 209; 409; 509) to said running gear frame unit (104; 204; 404; 504); - said suspension unit (106; 206; 306; 406; 506) comprising at least one spring unit (110; 210; 310; 410; 510) and at least one pendulum unit (111; 211; 311; 411; 511) arranged kinematically in series in a force flux between said running gear frame unit (104; 204; 404; 504) and said traverse unit (109; 209; 409; 509); - said at least one pendulum unit (111; 211; 311; 411; 511) having a first end section with a first articulation (111.3; 211.3; 311.3; 411.3; 511.3) associated to said running gear frame unit (104; 204; 404; 504) and a second end section with a second articulation (111.4; 211.4; 311.4; 411.4; 511.4) associated to said traverse unit (109; 209; 409; 509); - said first articulation (111.3; 211.3; 311.3; 411.3; 511.3) and said second articulation (111.4; 211.4; 311.4; 411.4; 511.4) allowing relative motion between said running gear frame unit (104; 204; 404; 504) and said traverse unit (109; 209; 409; 509) in said transverse direction and/or in said longitudinal direction by a pendulum motion of said pendulum unit (111; 211; 311; 411; 511); characterized in that - said first articulation (111.3; 211.3; 311.3; 411.3; 511.3) and/or said second articulation (111.4; 211.4; 311.4; 411.4; 511.4) is formed by said at least one spring unit (110; 210; 310; 410; 510) in that a longitudinal elasticity of said at least one spring unit (110; 210; 310; 410; 510) along a spring unit longitudinal axis of said at least one spring unit (110; 210; 310; 410; 510) provides a tilt axis of said pendulum unit (111; 211; 311; 411; 511).