Shock Absorbers
New JRZ AT PRO 4x4 Truck/SUV dampers
New JRZ AT PRO 4x4 Truck/SUV dampers
New JRZ AT PRO 4x4 Truck/SUV dampers

New JRZ AT PRO 4x4 Truck/SUV dampers

New in the 4x4 market but a pioneer in damping technology for over 50 years

JRZ Suspension Engineering was founded in 1994 by Jan Zuijdijk (author of the book “Vehicle dynamics and damping”) to bring a new and revolutionary damping design to the world of motor racing and high performance sports cars. A new design that would eliminate the design flaws of the old school hydraulic damper design and incorporate newly acquired insights into the complexity of vehicle dynamics and the role of the damper therein.

Having worked for Koni in Research and Development in damping design since the early sixties, Jan Zuijdijk had conceived a firm idea what needed to be changed on the stagnant approach to damping and handling of race car suspensions and the prominent role the hydraulic damper played in that complex vehicle dynamic system.


Based upon a long term experience gathered working with the most diverse damper designs ranging from Formula V, Formula One, prototype sports cars to industrial applications like trucks, buses, wheeled and tracked armored vehicles, the JRZ damper had to be different in a sense that the old school approach would be reversed and new insights and experience would prevail in the design.


The approach of the JRZ design philosophy is completely different than other damper manufacturers:
“Emphasis is on controlling the un-sprung mass”
This is achieved by:
 Large fluid displacement because of the use of large diameter piston rod
 Lifting force of shock-absorber by using high nitrogen pressure
 Compression damping with unique frequency responsive adjustable valving system in canister
 7075 CNC machined piston, with non preloaded deflective disc valves
 High flow return valve for quick refilling of working cylinder
 Gas volume is selected in a way that the fluctuating gas volume and the temperature have little effect in the increase of pressure


 No hopping
 Improved handling on road
 Improved handling off road
 More traction
 Better comfort level
 Better stability of vehicle body
 Increased lifetime of damper
 Leveling
 0 to 2 inch lift
 Long stroke kit customization possible