Bolster springs are used in walking beam suspension applications, particularly common in North America and for heavy duty applications. Being installed as a twin-axle unit, they connect the vehicle axle with the steel spring. Compared to the usual steel supports, they offer noise reduction, improved driving comfort and stability as well as protection of the steel spring from wear.

The adapted design of the bolster springs offers flexible spring rates, depending on the load situation: a soft spring rate for high driving comfort when the vehicle is unladen or a stiff spring rate for high stability when laden. The bolster spring characteristics can be flexibly adapted to different empty weights and payloads, making them an ideal solution for commercial vehicles in varying operating conditions.

The integrated pin limits the maximum spring deflection, resulting in high durability and reliable performance.

About Chassis Mounts

In the transportation industry, cargo and goods need to be delivered on the road over long distances as quickly and safely as possible without incurring damage for both the vehicle and load.

Products to reduce Noise, Vibration and Harshness in commercial vehicle chassis applications need to be effective, durable and reliable as they operate under high loads and stresses. Chassis mounts for trucks, busses, tractors and trailers control vibrations and absorb shocks transmitted from the road surface into the chassis of the vehicle.


Chassis mounts from Vibracoustic are important components to protect the axle, leaf springs and frame of commercial vehicles and improve handling, driving stability, safety and comfort. The product portfolio includes bolster springs, axle bump stops, leaf spring bushings, reaction rod bushes and stabilizer bar links.