ÖHLINS - Adventure S46 Shock (AP 661) for Aprilia Tuareg 660AP 661 It has a 46 mm piston and is available in a number of different applications with or without external reservoir either with a hose or in piggy back versions. It can also come with pre load spring adjusters, all depending on the kind of bike and requirements of the bike. It is also available with all different kinds of damping adjusters depending on the specific application. Type Code: S46PR1C1S Tech 46mm piston STX Damper Spec. by Application