Accurately machined aircraft level aluminum air chamber
Swappable air seals
Basic air fitting is certainly versatile to most stock air fill devices
Regular dust boot meant for extra defense up against the elements
The Original Air Shock from Progressive Suspension features a machined aluminum air chamber for perfect sealing surfaces, heavy duty springs, air adjustability and velocity sensitive, multi-stage valving. Years of testing, riding and experience have proven that the 416 Series is absolutely the finest air shock available. We start with an aluminum extrusion that is precision machined to exacting tolerances. The air chamber is then mated to our famous Progressive Suspension damper unit using the highest quality seals and bushings available. The 416Series is the perfect choice for the touring rider who carries a varied load. Air lines and fittings are easily installed. An optional adapter kit available for most touring bikes to tap into the stock air fill system (fill valve or air compressor).