Molded composite backside upright with 2 roll center roles, used on left or right side. Ab muscles compact backside uprights are small in size but because of the certain composite combination used additionally very strong. The lower roll center modification has 2 various positions on the upright while the top roll center adjustment has 3 different roles. The trunk uprights function 0° toe to make sure stability and avoid suspension geometry alterations in hard crashes.
For maximum drive train reliability larger 5x12 ball-bearings are employed in external position with additional dynamic load. On inner place the smaller 5x10 ball-bearings are used to minmise unsprung weight.
