Molded-composite left back upright features incorporated 1° of outboard toe-in to boost the rotation linked to the vehicle in corners preventing suspension system geometry alterations in severe crashes. Features two roll center jobs ahead regarding the back upright. Accommodates little but robust 5x10 ball-bearings for minimized unsprung fat.
rough rigidity (labeled H) especially optimized for foam-tire race.
Use with matching right-side back upright 303353. May be also ideal for rubber tires.