Progressive Suspension Series 422 Shock absorberRef : PRSU00149A / 13100852

Shock Absorber Series 422 — PROGRESSIVE SUSPENSION (manufacturer part number: 422-4101C). Designed for Softail and vintage/classic touring bikes, this chrome shock absorber combines aesthetics with road handling. Its heavy-duty design and gas-charged damping system provide a more consistent response under load while maintaining the original look of the motorcycle.

• RAP Preload Adjustment: practical external control for quickly adjusting the spring preload according to the load or the presence of a passenger; a simple turn of the knob changes the preload.
• Finish: polished chrome to respect the vintage look and highlight the rear end.
• Duty: designed for heavy-duty use.
• Reservoir: internal, discreet integration under the frame.
• Method: gas damping for a stable and controlled response.

Before installation: check the clearance and wheel travel — replacing shocks with a different length may alter the wheel arch and cause contact with the exhaust or swingarm. For motorcycles frequently used at maximum load, reinforced versions are recommended.

Common applications: Harley-Davidson Softail (e.g. FXSTS, FXSTB, FXST 1999 1340 cc) and other vintage/touring customs seeking comfort and accessible adjustments.