A leaf spring device for a vehicle, comprising a leaf spring apparatus made of a fiber composite plastic, a first bearing point provided at a first end section of the leaf spring apparatus for supporting the leaf spring device on the vehicle, the first bearing point comprising exactly three rotational degrees of freedom, and a second bearing point provided at a second end section of the leaf spring apparatus facing away from the first end section for supporting the leaf spring device on the vehicle, the second bearing point comprising exactly one rotational degree of freedom.

A leaf spring device for a vehicle, comprising a leaf spring apparatus made of a fiber composite plastic, a first bearing point provided at a first end section of the leaf spring apparatus for supporting the leaf spring device on the vehicle, the first bearing point comprising exactly three rotational degrees of freedom, and a second bearing point provided at a second end section of the leaf spring apparatus facing away from the first end section for supporting the leaf spring device on the vehicle, the second bearing point comprising exactly one rotational degree of freedom.

A vehicle suspension arrangement includes a suspension slider assembly including first and second laterally spaced longitudinal frame members configured to be slidably coupled to a first vehicle frame member, first and second gusset members fixed to the first and second longitudinal frame members and each including a relief, a first lateral frame member extending between the first and second longitudinal frame members, the first lateral frame member having ends received within the reliefs, an axle member configured to support a pair of wheel assemblies, and a suspension assembly configured to support the suspension slider assembly from the axle member, the suspension assembly including a spring member positioned between the suspension slider assembly and the axle member.

A suspension assembly for a vehicle having a first suspension coupled to a frame of the vehicle by a plurality of mounting brackets. The suspension assembly includes an adaptor having a plurality of mounting portions configured to align with and be coupled to the plurality of mounting brackets of the frame. A method for modifying a suspension of a vehicle includes uncoupling a first suspension from mounting brackets secured to a frame of the vehicle, coupling adaptors to the mounting brackets, and coupling a second suspension to the adaptors.

A suspension assembly for a vehicle having a first suspension coupled to a frame of the vehicle by a plurality of mounting brackets. The suspension assembly includes an adaptor having a plurality of mounting portions configured to align with and be coupled to the plurality of mounting brackets of the frame. A method for modifying a suspension of a vehicle includes uncoupling a first suspension from mounting brackets secured to a frame of the vehicle, coupling adaptors to the mounting brackets, and coupling a second suspension to the adaptors.

A vehicle suspension device according to the present invention is a suspension device and includes: a leaf spring; a locking member to which one end of the leaf spring is locked; and a holding member configured to hold another end of the leaf spring. The holding member includes: a roller configured to hold the other end of the leaf spring and be rotatable while following displacement of the other end of the leaf spring; and a pressing member facing the roller, and the other end of the leaf spring is provided between the roller and the pressing member.

A vehicle suspension device according to the present invention is a suspension device and includes: a leaf spring; a locking member to which one end of the leaf spring is locked; and a holding member configured to hold another end of the leaf spring. The holding member includes: a roller configured to hold the other end of the leaf spring and be rotatable while following displacement of the other end of the leaf spring; and a pressing member facing the roller, and the other end of the leaf spring is provided between the roller and the pressing member.