This schematic depicts all components used in the Superbike 2016 Usa (superbike Panigale R) D220-00016 26a - Perno Ruota Posteriore partslist.
In this schematic the "Nut, Flange M10x1" is used most often.
The 26a - Perno Ruota Posteriore is made up of components including this Rear Wheel Spindle which is the most expensive.