A frame for a vehicle includes a first housing and a second housing. The first housing and the second housing each define an interior space. The first housing and the second housing each comprises a first side portion and an opposing second side portion. The first housing and the second housing each include a first pair of triangular members coupled to the first side portion and a second pair of triangular members coupled to the second side portion. The first and second pairs of triangular members each support a wheel. A support assembly couples the first housing and the second housing. The support assembly includes an external lattice structure and an internal lattice structure. The external lattice structure is coupled to the first housing and the second housing. The internal lattice structure is coupled to the external lattice structure, the first housing, and the second housing.