Molded-composite back upright features integral 0° of outboard toe to improve traction and avoid suspension system geometry changes in severe crashes. Features two roll center roles on top of back upright. Accommodates tiny but robust 5x10 ball-bearings for minimized unsprung fat.
Medium rigidity (labeled M) particularly optimized for rubber-tire race.
usage on both left and right edges of this automobile. Is additionally useful for foam tires.
