A UTV portal axle system is disclosed, including a spindle with a housing for housing input and output drive gears coupled by one or more idler gears. The output drive gear is disposed lower than the input drive gear to provide additional ground clearance to the UTV. The king pin axis angle is substantially the same as that of a stock UTV, while maintaining a scrub radius of substantially one inch or less. This is accomplished by the lower control arm ball joint being located within a recess of the output drive gear. This allows the UTV to be properly controlled when driven at high speeds over rough or uneven terrain. The gears may be interchangeable to allow the gear ratio to be adjusted to be more suitable for use at various driving speeds. A method of changing the gear ratio is also disclosed.

A multi-functional off-road vehicle has a frame which includes a left lateral frame member and a right lateral frame member. The two frame members are connected by a crossbar. Four wheel assemblies are connected to the frame. At least two of the wheel assemblies are continuous tracks. The crossbar includes a track width adjustment actuator which extends and contracts a length of the crossbar and thereby changes a track width of the vehicle.

A multi-functional off-road vehicle has a frame which includes a left lateral frame member and a right lateral frame member. The two frame members are connected by a crossbar. Four wheel assemblies are connected to the frame. At least two of the wheel assemblies are continuous tracks. The crossbar includes a track width adjustment actuator which extends and contracts a length of the crossbar and thereby changes a track width of the vehicle.

A vehicle includes a trailer assembly supported by a rear chassis system. The rear chassis system includes a chassis frame having at least two longitudinal chassis members. The rear chassis system includes a rear suspension frame coupled to a back rear axle. The rear suspension frame includes a bearing head with a bearing aperture. Equalizing beams extend between the front rear axle and the back rear axle, with each equalizing beam including a bushing aperture. The rear chassis system also includes a plurality of suspension mounts. To minimize relative translations experienced by the suspension mounts during operation of the vehicle, opposing end sections of a spindle cross member, along with the bearing aperture and the bushing aperture are coaxially aligned. Likewise, the opposing spindle end sections, the bearing aperture, the bushing aperture, and a top plate of each suspension mount are coplanar.

A vehicle includes a trailer assembly supported by a rear chassis system. The rear chassis system includes a chassis frame having at least two longitudinal chassis members. The rear chassis system includes a rear suspension frame coupled to a back rear axle. The rear suspension frame includes a bearing head with a bearing aperture. Equalizing beams extend between the front rear axle and the back rear axle, with each equalizing beam including a bushing aperture. The rear chassis system also includes a plurality of suspension mounts. To minimize relative translations experienced by the suspension mounts during operation of the vehicle, opposing end sections of a spindle cross member, along with the bearing aperture and the bushing aperture are coaxially aligned. Likewise, the opposing spindle end sections, the bearing aperture, the bushing aperture, and a top plate of each suspension mount are coplanar.

A vehicle includes a trailer assembly supported by a rear chassis system. The rear chassis system includes a chassis frame having at least two longitudinal chassis members. The rear chassis system includes a rear suspension frame coupled to a back rear axle. The rear suspension frame includes a bearing head with a bearing aperture. Equalizing beams extend between the front rear axle and the back rear axle, with each equalizing beam including a bushing aperture. The rear chassis system also includes a plurality of suspension mounts. To minimize relative translations experienced by the suspension mounts during operation of the vehicle, opposing end sections of a spindle cross member, along with the bearing aperture and the bushing aperture are coaxially aligned. Likewise, the opposing spindle end sections, the bearing aperture, the bushing aperture, and a top plate of each suspension mount are coplanar.

A vehicle includes a trailer assembly supported by a rear chassis system. The rear chassis system includes a chassis frame having at least two longitudinal chassis members. The rear chassis system includes a rear suspension frame coupled to a back rear axle. The rear suspension frame includes a bearing head with a bearing aperture. Equalizing beams extend between the front rear axle and the back rear axle, with each equalizing beam including a bushing aperture. The rear chassis system also includes a plurality of suspension mounts. To minimize relative translations experienced by the suspension mounts during operation of the vehicle, opposing end sections of a spindle cross member, along with the bearing aperture and the bushing aperture are coaxially aligned. Likewise, the opposing spindle end sections, the bearing aperture, the bushing aperture, and a top plate of each suspension mount are coplanar.

A suspension structure of a utility vehicle includes: a shock absorber; a knuckle; and an upper arm and a lower arm which connects the knuckle to a vehicle body frame of the utility vehicle, wherein a recessed portion which is recessed downward is formed on the upper arm, and a lower end of the shock absorber is supported by the recessed portion.

A suspension structure of a utility vehicle includes: a shock absorber; a knuckle; and an upper arm and a lower arm which connects the knuckle to a vehicle body frame of the utility vehicle, wherein a recessed portion which is recessed downward is formed on the upper arm, and a lower end of the shock absorber is supported by the recessed portion.

A spreader sprayer system includes a frame member defining a frame body that has a first side, a second side, a front portion, and a rear portion, a first walking member pivotably coupled to the first side of the frame body, a second walking member pivotably coupled to the second side, a first and second plurality of drive wheels, and at least one spray container. The first plurality of drive wheels are disposed on the first side of the frame body and are operatively coupled to the first walking member. The second plurality of drive wheels are disposed on the second side of the frame body and are operatively coupled to the second walking member. Each spray container is coupled to at least one of the first walking member or the second walking member.