Trailer Suspension: Rocker Roller Suspension vs. Slipper Springs

Custom Trailers

When it comes to trailer suspension systems, two popular options are rocker roller suspension and slipper springs. Both mechanisms play a crucial role in providing a smooth and stable ride for trailers, ensuring the safety of cargo and enhancing overall towing experience. In this blog, we will explore the characteristics, advantages, and drawbacks of rocker roller suspension and slipper springs to help you make an informed decision when choosing the right suspension system for your trailer.

Rocker Roller Suspension:

Rocker roller suspension, also known as tandem axle suspension, is a widely used suspension mechanism in trailers. It consists of two sets of leaf springs mounted to a central hanger, allowing the axles to move independently. The key features of rocker roller suspension are as follows:

  • Smooth Ride: The independent movement of each axle in the rocker roller suspension provides excellent shock absorption, resulting in a smoother ride for the trailer and its contents. This is especially beneficial when transporting fragile or delicate cargo.
  • Even Load Distribution: Rocker roller suspension helps distribute the weight evenly across the axles, reducing the strain on individual components. This balanced weight distribution contributes to better stability and improved handling.
  • Enhanced Maneuverability: The independent movement of axles in rocker roller suspension allows for improved maneuverability, making it easier to navigate tight corners and uneven terrains.

However, it's important to consider a few drawbacks of rocker roller suspension as well:

  • Cost: Rocker roller suspension tends to be more expensive compared to slipper springs due to its complex design and additional components.
  • Maintenance: The multiple moving parts in rocker roller suspension may require more frequent maintenance and inspection to ensure optimal performance.

Slipper Springs:

Slipper springs are another commonly used suspension system in trailers. They consist of one or more leaf springs that attach directly to the trailer frame at one end and the axle at the other end. Let's delve into the advantages and disadvantages of slipper springs:

  • Cost-Effective: Slipper springs are generally more affordable compared to rocker roller suspension. Their simple design and fewer components contribute to lower manufacturing and installation costs.
  • Durability: Slipper springs are known for their durability and ability to withstand heavy loads. They are designed to provide reliable performance in various towing conditions.
  • Ease of Maintenance: Slipper springs are relatively easy to maintain. Their straightforward construction makes inspection and replacement of worn-out parts simpler and less time-consuming.

However, there are a few considerations to keep in mind when choosing slipper springs:

  • Ride Quality: Slipper springs may not provide the same level of shock absorption and smooth ride as rocker roller suspension. The absence of independent axle movement can result in a slightly rougher towing experience.
  • Weight Distribution: Proper weight distribution becomes critical with slipper springs, as uneven loading can cause uneven tire wear and compromise trailer stability. Regular checks and adjustments may be required.

Both rocker roller suspension and slipper springs offer distinct advantages and considerations for trailer suspension systems. Rocker roller suspension provides a smoother ride, even load distribution, and enhanced maneuverability, but at a higher cost and potentially increased maintenance needs. Slipper springs, on the other hand, offer a cost-effective solution, durability, and ease of maintenance, although they may not deliver the same level of ride quality and require more attention to weight distribution.

Ultimately, the choice between rocker roller suspension and slipper springs depends on your specific needs, budget, and the type of cargo you intend to transport. Consulting with Basic Trailers, your trusted trailer expert and mechanic, who can help you determine the most suitable suspension system for your trailer, ensuring a safe and comfortable towing experience.


At Basic Trailers, our team of knowledgeable professionals understands the intricacies of trailer suspension systems and can provide valuable insights to help you make an informed decision. Whether you have questions about the benefits of rocker roller suspension or the advantages of slipper springs, Basic Trailers' experts can provide you with the information you need.

Moreover, Basic Trailers offers a wide range of high-quality trailers for sale in Adelaide, all made in Australia. From car trailers to plant trailers, we have a diverse selection to meet your specific requirements. Our commitment to exceptional build quality and attention to detail ensures that you will receive a trailer that is reliable, durable, and perfectly suited to your needs.

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