Molded-composite straight back upright features fundamental 0° of outboard toe to boost traction and prevent suspension system system geometry alterations in serious crashes. Features two roll center jobs over back upright. Accommodates small but robust 5x10 ball-bearings for minimized unsprung fat.
moderate rigidity (labeled M) particularly optimized for rubber-tire competition.
Use on both staying and right sides connected to vehicle. Are helpful for foam tires.
