REAR SHOCK ABSORBERS BITUBO HD036WME03 HARLEY DAVIDSON FXDBA DYNA 103 STREET BOB 2014 > 2015. The linear or progressive springs are chosen according to the type of vehicle application. The wide adjustments range offers excellent performance, for the rider only or at full load. He shocks are pressurized with Nitrogen gas with oil/gas separate floating piston. Shock body in high resistance alloy steel. Billet aluminium heads with CNC machining. Settings: spring preload, rebound.