Molded-composite rear upright features built-in 0° of outboard toe to improve traction and prevent suspension geometry changes in serious crashes. Features two roll center positions on the top of the rear upright. Accommodates small but robust 5×10 ball-bearings for minimized unsprung weight.
Hard rigidity (labeled “H”) specially optimized for foam-tire racing.
Use on both left and right sides of the car. Can be also used for rubber tires.