Torsion spring suspension

A suspension assembly for attaching wheel assemblies to a frame includes a pair of torsion spring subassemblies adjustably interconnected by a center axle tube to form a unitary axle-like assembly whose torsion spring subassemblies can be adjustably fixed in various desired spaced positions for connection to a selected frame having a particular width. Each torsion spring subassembly includes a torque limiter and further includes an outer tube with a bracket-like mounting member thereon for connecting the outer tube to the side beams on the frame, the bracket member being generally planar in shape and adapted to communicate forces from wheels directly through the torsion spring subassemblies to the frame in a manner that minimizes deformation when the torque limiter engages. A method comprises providing a pair of torsion spring subassemblies, releasably adjustably interconnecting the torsion spring subassemblies with a center axle member to form a unitary axle-like suspension assembly having a particular width, and connecting the suspension assembly to a frame having a particular width.