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What Types of Trailer Suspensions Are There?

Suspension is a crucial component of semi-trailers that connects the walking device of the chassis and frame.The support, braking, and the force driving the semi-trailers is all transferred through the suspension system.It could also lessen the effect of roads that are not safe on vehicles by absorbing shock and help ensure safety of the trailer. In this article, we will present four types of suspension for trailers that are most commonly used: Spring suspension, Airbag suspension, Bogie suspension, rigid suspension.


Spring suspension is also known as leaf spring.It is made up of U bolt, shackle, leaf spring etc.
Advantage:cheap,reliable and easily maintain.

Today, more than 80% of semi-trailers across Asia and Africa employ spring suspension.

Common trailer type that uses Ifor Williams suspension are: skeleton trailers, flatbed trailers, fuel tanker trailer, bulk cement trailer, low bed trailer, tipper trailer etc.


The most obvious characteristic in airbag suspension would be air spring in the air bag.

Advantage: Light weight, good stability

However, the cost for airbag suspension can be high.Now the majority of trailers equipped with airbag suspension are utilized to transport precision instrument, tobacco and other hazardous chemical cargo.

Common trailer types that utilize airbag suspension:flatbed trailers, aluminum tanker trailers, acid tanker trailer and so on.


Bogie suspension is a tandem Bogie suspension can be described as a tandem suspension that meets the requirements of heavy transportation services.
Advantage: Big payload, low maintenance cost

The road wheels of this type of suspension are independent, and their unsprung mass is less than other suspension systems.

Common trailer type that uses bogie suspensions: logging trailer, tipper trailer etc.


The rigid axle is the exact other side of an independent suspension.These kinds of suspensions depend on the wheels that are adjacent to the vehicle.In the case of a solid or rigid suspension, a shaft or beam is usually connected to with wheels both sides.Hence whenever one of the wheels gets hit by an obstacle or pothole, the other wheel will also be affected.

Benefit: High payload

The ride’s height stays the same regardless of whether the semi-trailer’s loader is or unloading.It is more suitable at low speeds, due to the insufficient damping.

Common trailer type with rigid suspension Low bed trailer