Provided is a truck with a lowerable bed for reducing the height difference between the ground and a payload area to provide easy loading and unloading. A traction system for a truck with a lowerable bed is also provided.

An aerodynamic trailer system is provided that has a skirt support member with a trailer attachment that attaches the skirt support member to a trailer. The skirt support member has a skirt attachment that attaches the skirt support member to a skirt. The skirt has a height that extends in a vertical direction of the aerodynamic trailer system. The skirt has an upper side, a lower side, a front side, and a rear side. The skirt also has a lower section that extends in the vertical direction from the lower side to an attachment location with the skirt attachment. The skirt has an upper section that extends in the vertical direction from the attachment location to the upper side. The lower section has a higher bending stiffness than the upper section.

A mounting system for a vehicle with one or more cross members. The mounting system includes a mounting rail including a mounting platform and at least one mounting slot being formed in the mounting platform. The mounting system includes a panel bracket coupled to the mounting rail that is configured to receive at least one guard panel. The mounting system includes at least one clamping body removably coupled to the mounting platform of the mounting rail. The at least one clamping body is configured to engage a cross member and the mounting platform is configured to engage the cross member so as to clamp the cross member between the at least one clamping body and the mounting platform.

A side underride system configured to be coupled to a trailer is provided. The side underride system includes a support system, including a brace system and a cable, configured to be positioned below the trailer to provide side underride protection. The brace system includes a plurality of cross-braces that each extend across a width of the trailer and are spaced apart at intervals along a length of the trailer. The cable is configured to extend across the intervals between the cross-braces.

A side underride system configured to be coupled to a trailer is disclosed. The side underride system comprises a support system configured to be positioned below the trailer to provide side underride protection. The support system includes a cable system and a brace system. The cable system is configured to couple to the trailer. The brace system includes a plurality of cross-braces that each extend at least partially across a width of the trailer, are spaced apart at intervals along a length of the trailer, and are configured to capture the cable system.

In a truck having a plate-like side guard disposed at each of the right and left side faces of a vehicle body and arranged apart from the lower face of a cargo bed, a flexible sheet having a rectangular shape is attached between the cargo bed and the side guard. The sheet has one end portion in the vertical direction secured to one of the cargo bed and the side guard, and the other end portion in the vertical direction, detachably fastened to the other of the cargo bed and the side guard.

Provided is a truck with a lowerable bed for reducing the height difference between the ground and a payload area to provide easy loading and unloading. A traction system for a truck with a lowerable bed is also provided.

A mounting system for a guard panel on a vehicle with cross members. The mounting system comprises a mounting rail having first and second ends. The mounting rail includes a clamping portion including a mounting platform, a mounting slot in the mounting platform along a length of the mounting rail between the first and second ends, and a panel portion. The mounting system includes a panel bracket coupled to the panel portion. The panel bracket receives at least one guard panel. The mounting system includes a clamping body coupled to the mounting platform. The clamping body is movable along the mounting slot of the mounting platform. The clamping body engages a first surface of a cross member and the mounting platform engages a second surface of the cross member so as to clamp the cross member between the clamping body and the mounting platform.

A side underride guard for attachment to the underside of a trailer comprising two guard rails longitudinally positioned below the outer sides of the trailer, with each guard rail attached to the trailer by a plurality of vertical support members and by a plurality of diagonal support members.

A retractable under-guard, for example for dual-purpose trucks that travel on-road and off-road, provides impact protection to other vehicles colliding with the truck, but is raised for off-road travel to avoid obstacles. The under-guard connects by a frame wrap to horizontal frame beam(s) of many different trucks and does not hang down in its retracted position to an extent that it interferes with off-road travel. For entering the road, the guard frame pivots downward to the desired position at or near the outer perimeter of the truck, and typically about half way between the truck frame and the ground in the space into which a lower vehicle would enter in a collision. Hook and pin systems, and/or impact plates, maintain the under-guard in proper position upon an impact. The under-guard system may automatically deploy above a predetermined truck speed, to ensure deployment when the truck re-enters the roads.