FRONT SHOCKS BITUBO HD003JBH12WO HARLEY DAVIDSON FXDB DYNA STREET BOB 2006 > 2012. Pressurized cartdrige – Adj: spring preload; Rebound, Compression; WITHOUT Oil; BLACK ring. It requires no modification of the original components, and allows resetting the original suspension at any time. Rebuildable in all its parts thus keeping the efficiency of the motorcycle for all its life. Lowerable up to 30 mm according to the application (lowering kit included inside the pack). Possible to modify : Preload – Compression – Rebound.