Progressive vs Regressive Valving of shock absorbers

The type of valving in a shock absorber refers to the way in which the shock absorber responds to changes in the motion of the suspension. Valving is the term used to describe the internal mechanisms that control the flow of hydraulic fluid within the shock absorber.

Shock absorbers with regressive valving have an internal valve that restricts the flow of hydraulic fluid as the suspension moves. This means that the shock absorber offers more resistance to motion at the beginning of the suspension’s movement, and less resistance at the end of the movement. This type of valving is commonly used in off-road vehicles, where the suspension is subjected to sudden, large impacts.

Shock absorbers with progressive valving, on the other hand, have an internal valve that allows for an increasing flow of hydraulic fluid as the suspension moves. This means that the shock absorber offers less resistance at the beginning of the suspension’s movement, and more resistance at the end of the movement. This type of valving is commonly used in vehicles that are designed for smooth, controlled performance on paved roads.

Overall, the difference between shock absorbers with regressive and progressive valving is the way in which they respond to changes in the motion of the suspension. Regressive valving offers more resistance at the beginning of the suspension’s movement, while progressive valving offers less resistance at the beginning. The type of valving that is best suited to a particular vehicle will depend on the specific needs and characteristics of that vehicle.