Best in basic The basic model of Wilbers Racing Suspension mono-shocks is delivered with a blue coloured spring for the Sports-line and a black one for the Classic-line. The suspension system makes no compromises, neither in response or reaction nor in durability. A radial shaft imbedded in a wet run, Teflon coated swing points and other unique components redefine the standard of mono-shock absorbers. The preload is continuously adjustable and the rebound setting can be changed through its open bleed mechanism by 22 clicks. The Wilbers unit assembly system empowers us to offer maximum individuality in fulfilling special customer demands while making extra charges unnecessary.