Running gear frame for a running gear of a rail vehicle with - a frame body, which is configured to be supported on at least one wheel unit of said running gear, wherein - said frame body (101; 201; 301) is configured to be substantially H-shaped and has a forward section with two forward longitudinal beam sections (302.1), a middle section with two middle longitudinal beam sections (302.2), and a rear section with two rear longitudinal beam sections (302.3), - said middle section comprises least one transverse beam extending in a transverse direction of said running gear, - said middle section (302.2, 303), connects said forward section (302.1) and said rear section (302.3), - said forward longitudinal beam sections (302.1) are configured to be supported on a leading wheel unit of said running gear, and - said rear longitudinal beam sections (302.3) are configured to be supported on a trailing wheel unit of said running gear, characterized in that - at least said middle section (302.2, 303) of said frame body is monolithically formed of a grey cast iron material, - said forward longitudinal beam sections (302.1) of said forward section and/or said rear longitudinal beam sections (302.3) of said rear section are respectively connected, in particular disengageably connected, to said respective middle longitudinal beam section (302.2) in the region of a joint location (302.7) in a manner rotatable about a transverse axis such that a compression element disposed between said respective longitudinal beam section (302.1, 320.3) and said middle longitudinal beam section (302.2) in the region of said joint location (302.7) takes the function of a primary suspension of said running gear. - a frame body, which is configured to be supported on at least one wheel unit of said running gear, - said frame body (101; 201; 301) is configured to be substantially H-shaped and has a forward section with two forward longitudinal beam sections (302.1), a middle section with two middle longitudinal beam sections (302.2), and a rear section with two rear longitudinal beam sections (302.3), - said middle section comprises least one transverse beam extending in a transverse direction of said running gear, - said middle section (302.2, 303), connects said forward section (302.1) and said rear section (302.3), - said forward longitudinal beam sections (302.1) are configured to be supported on a leading wheel unit of said running gear, and - said rear longitudinal beam sections (302.3) are configured to be supported on a trailing wheel unit of said running gear, - at least said middle section (302.2, 303) of said frame body is monolithically formed of a grey cast iron material, - said forward longitudinal beam sections (302.1) of said forward section and/or said rear longitudinal beam sections (302.3) of said rear section are respectively connected, in particular disengageably connected, to said respective middle longitudinal beam section (302.2) in the region of a joint location (302.7) in a manner rotatable about a transverse axis such that a compression element disposed between said respective longitudinal beam section (302.1, 320.3) and said middle longitudinal beam section (302.2) in the region of said joint location (302.7) takes the function of a primary suspension of said running gear.