OEM Aprilia Rear Wheel Bearing -#8110093 (AP8110093)
Genuine Aprilia rear wheel bearing for '04-'07 RSVR Factory, '07 Tuono Factory, '00.5-'03 Mille-R, and '03-'05 Tuono Factory, Tuono Racing.
Though not ceramic, this wheel bearing is the one recommended for use with the Aprilia's premium sports models.
Aprilia part no 8110093
Part no 15 in the diagram