Molded-composite remaining back upright features integrated 1° of outboard toe-in to boost the rotation of this car in corners and avoid suspension geometry changes in severe crashes. Features two roll center positions on the top regarding the rear upright. Accommodates little but robust 5x10 ball-bearings for minimized unsprung fat.
intense rigidity (labeled H) specially optimized for foam-tire race.
utilize with matching right-side back upright 303353. Are additionally useful for rubber tires.