Axles & Suspension Spring Sets Leaf Springs

Springs Only (pr) 1250kg Zinctech 5 leaf

NZ $177.00 excl GST
SKU: 60003
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Description

This pair of 5-leaf trailer springs supports up to 1,250 kg per axle, making them ideal for light to medium-duty trailer builds, repairs, or upgrades. Designed with progressive spring compression, these springs adjust to varying loads, providing a smoother ride when lightly loaded and increased support under heavy loads.

Each spring is constructed from 6 mm thick high-tensile steel for long-lasting durability. A longer second leaf adds extra strength, while the anti-rattle design helps reduce vibration and noise during travel. Finished with a Zinctech anti-corrosion coating and pre-fitted with durable nylon bushes, these springs are built to perform and protect—no matter the conditions.

Key Features

  • Load capacity: 1,250 kg per axle (pair)
  • Progressive spring compression for adaptable ride quality
  • 5-leaf configuration with extended second leaf for increased durability
  • Anti-rattle design reduces noise and wear during operation
  • Hard-wearing nylon bushes pre-installed
  • Constructed from high-tensile 6 mm thick steel leaves
  • 50 mm width for stability and compatibility with standard hangers
  • Springs finished in Zinctech coating for superior corrosion resistance

Applications

  • General-purpose and domestic trailers
  • Tool, tradesman, and equipment trailers
  • Agricultural and rural transport
  • Boat trailers and recreational carriers
  • Machinery and plant trailers
  • Ideal for custom builds or suspension upgrades

Specifications

  • Trailer Spring Type: Eye-to-slipper trailer leaf spring
  • Number of Leaves: 5 per spring
  • Width: 50 mm
  • Leaf Thickness: 6 mm
  • Load Rating: 1,250 kg per pair
  • Spring finish: Zinctech anti-corrosion coating
  • Inclusions: One pair of springs

FAQs

Q: What is progressive spring compression?

A: 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.

Q: What is Zinctech coating?

A: Zinctech is a specialised corrosion-resistant zinc coating applied to steel components. It offers strong protection against rust, extending the life of springs and hardware in outdoor environments.

Q: Why is the second leaf longer?

A: A longer second leaf supports the main leaf, reducing stress on the eye area and extending the trailer spring's service life.

Q: What are anti-rattle leaves?

A: 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.

Q: Can I get axles with this kit?

Yes. You can add ready-made axles or custom fabricated axles to your order. To get axles made to your specifications, please visit: https://www.treadway.co.nz/Resources/Axle-Fabrication.html

Q: Does this kit include mounting hardware?

A: This listing includes one pair of springs only. Mounting components like bolts, hangers, and slippers are sold separately, but spring sets with mounting components are also available here at Treadway.

Visit this page for spring sets with different load ratings: https://www.treadway.co.nz/shop/components/Trailer+Suspension.html?range=0-24

For accessories: https://www.treadway.co.nz/shop/trailer-accessories.html

Specifications

Load Rating: 1250kg
Type/Finish: Zinctech

Questions?

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