Axles & Suspension Trailer Spring Kits & Suspension Components Leaf Springs

Springs Only (pr) 1500kg Zinctech 6 leaf

NZ $197.00 excl GST
SKU: 60004
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Description

This pair of 6-leaf trailer springs is engineered for trailers requiring increased load capacity and durability. Rated at 1,500 kg per axle, they are ideal for light to heavy-duty applications including equipment transport, tradesman trailers, and rural use. Built from 50 mm wide, 6 mm thick high-tensile steel, these springs provide reliable support and a longer service life.

Each spring is equipped with progressive spring compression for improved ride quality under varying loads. They also feature anti-rattle leaves to minimise noise and vibration, a longer second leaf for added strength, and pre-installed hard-wearing nylon bushes.

Key Features

  • Load rating: 1,500 kg per axle (pair)
  • 6-leaf construction for heavy-duty applications
  • Progressive spring compression ensures a smoother ride under changing loads
  • Includes anti-rattle leaves for quieter operation and reduced wear
  • Longer second leaf adds support to the eye area and reduces stress
  • 50 mm wide leaves for compatibility with common trailer fittings
  • 6 mm thick high-tensile steel for strength and longevity
  • Zinctech finish on springs offers excellent corrosion protection
  • Pre-installed hard-wearing nylon bushes

Applications

  • Suitable for both single and tandem axle trailer setups
  • Equipment and machinery trailers
  • Tradesman and commercial trailers
  • Agricultural and rural haulage
  • Plant and construction transport
  • Boat and heavy-duty recreational trailers
  • Ideal for trailer builds, upgrades, and replacement projects

Specifications

  • Trailer Spring Type: Eye-to-slipper trailer leaf spring
  • Number of Leaves: 6 per spring
  • Width: 50 mm
  • Leaf Thickness: 6 mm
  • Bushes: Hard-wearing nylon bushes pre-fitted
  • Load Capacity: 1,500 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 trailer 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

Brand: Treadway
Load Rating: 1500kg
Material: Steel with Zinctech finish
Type/Finish: Corrosion resistant Zinctech
Width: 50mm
Length: 610mm (eye to end)

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