Trailer Spring FAQs

When it comes to trailer springs a Zinctech coating is preferable to hot dip galvanising. The process of hot dip galvanising is carried out at a much higher temperature than Zinctech. When steel is exposed to very high temperatures it can cause the metal to become brittle. This is not desirable for leaf springs.

Unlike linear springs that compress at a constant rate, a progressive spring features leaves designed to increase stiffness as they compress. This design allows the trailer spring to provide a smoother ride under light loads while offering greater support under heavier loads. As a result, it delivers better control across varying conditions and helps prevent excessive sag. This dual-rate behaviour allows your trailer to handle a wider range of load conditions without sacrificing control, ride quality, or safety. It also helps reduce wear on other suspension components and minimises the risk of bottoming out under heavy loads.

Anti-rattle leaves are designed to minimise movement and noise in a leaf spring suspension system. At the slipper end, the spring leaves are spread out (or “fanned”) rather than stacked tightly together. This creates a snug fit inside the slipper, which helps reduce rattling, wear, and vibration during towing.

A common point of failure is around the eye of the spring. Treadway springs have a longer second leaf that supports the eye to improve the longevity of the springs.

You can add ready-made axles or custom fabricated axles to your order. To get axles made to your specifications, please visit our axle fabrication page.