A suspension is provided, which has proximal and distal ends and a
longitudinal axis extending from the proximal end toward the distal end.
A rotating hinge rotates the distal end about the longitudinal axis in
response to vertical motion of the distal end relative to the proximal
end. In one example, the suspension includes a preformed twist
deformation, which rotates the distal end about the longitudinal axis
relative to the proximal end axis in a direction opposite to rotation by
the rotating hinge, in response to the vertical motion.