Progressive Suspension 420 Series Shock Absorbers

The Progressive suspension  420 Series Single Shock is machined from aircraft quality aluminum that is then anodized to protect the finish. It utilizes a twin wall design that incorporates a unique internal bladder for oil/gas separation. The 420 Series features velocity sensitive, multi-stage valving for a consistent,
controlled ride and great handling. The shock shaft is made from 14mm Chromoly steel and is then hard chromed for durability and smooth operation. Only the highest quality internal seals and bushings are used. The 420 features heavy-duty spherical bearings in the eyelets. On the
off-road side, we offer the finest suspension package for your off-road or dual sport motorcycle. The damping and spring rates for the 420 Series Shock have been specially developed for each unique application. For Cruisers, we offer the 420 Series in a standard length and a 1” lowered length on select applications.

• Multistage-valved Velocity Sensitive machined aluminumbodied damper
• Twin wall design with unique internal bladder system keeps air and high pressure nitrogen separate for consistent damping
• Durable 14mm Chromoly Shaft is hard chrome plated to minimize stiction
• Threaded, notched preload adjuster with lock ring permits fine-tuned preload adjustment