Newly-redesigned rear uprights allow mounting of graphite aerodynamic disks. The compact rear uprights are small in size but thanks to the special composite mixture used, they are also very strong. Thanks to perfect molding, bearings fit into the steering block without any extra play for maximum stability and handling.   The rear uprights feature two easily-adjustable upper roll center positions which are used for traction adjustment. The uprights also feature two body mount adjustment positions depending on the type of body used. Also included are shorter and longer pivot ball joints for optimum set-up adjustment.