A universal assembly platform for lightweight vehicles, wherein the platform comprises a main vehicle chassis structure, a front suspension system connected to the main vehicle chassis structure and to which one or more front wheel assembly is mountable, and a rear suspension system connected to the main vehicle chassis structure and to which one or more rear wheel assembly is mountable. The rear suspension system is connected to the main vehicle chassis structure such that when the one or more rear wheel assembly is mounted to the rear suspension system a rear wheel of the one or more rear wheel assembly defines the distal end of an overall length of the vehicle.

A universal assembly platform for lightweight vehicles, wherein the platform comprises a main vehicle chassis structure, a front suspension system connected to the main vehicle chassis structure and to which one or more front wheel assembly is mountable, and a rear suspension system connected to the main vehicle chassis structure and to which one or more rear wheel assembly is mountable. The rear suspension system is connected to the main vehicle chassis structure such that when the one or more rear wheel assembly is mounted to the rear suspension system a rear wheel of the one or more rear wheel assembly defines the distal end of an overall length of the vehicle.

A lightweight vehicle includes a pair of rear wheel assemblies, a pair of front wheel assemblies, a chassis, a front suspension system coupling the pair of front wheel assemblies to the chassis, a rear suspension system coupling the pair of rear wheel assemblies to the chassis, a frontmost seat supported by the chassis, a rearmost seat supported by the chassis where at least a portion of the rearmost seat is located longitudinally rearward of an axis extending through a center of the pair of rear wheel assemblies, a first footwell associated with the frontmost seat, a second footwell associated with the rearmost seat where the first footwell and the second footwell are coplanar, and an electric motor configured to drive the pair of rear wheel assemblies and at least partially positioned beneath the rearmost seat.

A lightweight vehicle includes a pair of rear wheel assemblies, a pair of front wheel assemblies, a chassis, a front suspension system coupling the pair of front wheel assemblies to the chassis, a rear suspension system coupling the pair of rear wheel assemblies to the chassis, a frontmost seat supported by the chassis where the frontmost seat includes a first seat bottom and a first seat back, a rearmost seat supported by the chassis and facing forward where the rearmost seat includes a second seat bottom and a second seat back, a floorboard coupled the chassis, and an electric motor configured to drive the pair of rear wheel assemblies and at least partially positioned beneath the second seat bottom. At least a portion of the rearmost seat is located longitudinally rearward of an axis extending through a center of the pair of rear wheel assemblies.

A lightweight electric vehicle includes a chassis, a pair of rear wheel assemblies, a pair of front wheel assemblies, a front suspension system, a rear suspension system, a pedestal supported by the chassis, a frontmost seat supported by the pedestal, a rearmost seat configured to accommodate a plurality of occupants and supported by the chassis, a floorboard coupled the chassis, and an electric motor configured to drive at least one of the pair of front wheel assemblies or the pair of rear wheel assemblies. The rearmost seat faces forward. At least a portion of the rearmost seat is located longitudinally rearward of an axis extending through a center of the pair of rear wheel assemblies. The floorboard is substantially flat such that a first footwell in front of the frontmost seat and a second footwell in front of the rearmost seat are coplanar.

A trailer includes a trailer frame using suspension cables supported from vertically extending towers on opposite sides of the trailer frame and connected to distal ends of the trailer frame for supporting distal portions of the trailer frame. The trailer bed frame comprises a plurality of folding frame sections which can be unfolded into planar alignment to form the trailer frame and folded into an overlapping or stacked alignment for storage. Left and right wheels are rotatably mounted on left and right suspensions which are removably securable to left and right sides of the trailer frame. The suspensions comprise quarter elliptical leaf spring suspensions formed from curved upper and lower leaf springs spaced apart by inner and outer spacers.

A retrofit kit for replacing an existing leaf spring suspension system, methods of replacing the existing leaf spring suspension systems, and suspension systems may include an upper load beam having a proximal end and a distal end, the distal end being configured to pivotally mount to a vehicle. A lower control arm includes a proximal end, a distal end, and a mounting location positioned between the proximal end distal ends. The distal end of the lower control arm is configured to pivotally engage a leaf spring mounting eye provided on the vehicle. The mounting location on the lower control arm is configured to pivotally receive the proximal end of the upper load beam.

A retrofit kit for replacing an existing leaf spring suspension system, methods of replacing the existing leaf spring suspension systems, and suspension systems may include an upper load beam having a proximal end and a distal end, the distal end being configured to pivotally mount to a vehicle. A lower control arm includes a proximal end, a distal end, and a mounting location positioned between the proximal end distal ends. The distal end of the lower control arm is configured to pivotally engage a leaf spring mounting eye provided on the vehicle. The mounting location on the lower control arm is configured to pivotally receive the proximal end of the upper load beam.