Molded-composite right back upright features integral 1° of outboard toe-in to boost the rotation of the car in corners and stop suspension geometry changes in severe crashes. Features two roll center jobs at the top of this back upright. Accommodates small but robust 5x10 ball-bearings for minimized unsprung weight.
tough rigidity (labeled H) specially optimized for foam-tire race.
Use with matching left-side rear upright 303363. Is additionally used for rubber tires.
