Description

Ideal for medium-duty trailers, this trailer spring system includes 2 sets of progressive springs with anti-rattle leaves and a longer second leaf for additional structural support. Coated with Zinctech for strong rust and corrosion resistance, the springs are suitable for use in both dry and high moisture environments. This set comes with pre-installed nylon bushes and a full set of tandem rocker arms and mounting hardware—a complete, ready-to-install solution for light to medium tandem axle trailers.

Key Features

  • Suits tandem axle trailers with a total load capacity of 1,500 kg
  • Progressive spring compression adapts to variable loads
  • Zinctech coating on the springs provides enhanced resistance to wear and the elements
  • Anti-rattle leaf design reduces vibration for quieter operation
  • Longer second leaf improves spring stability and longevity
  • Anti-rattle slippers fit snugly around the springs to further reduce movement and wear
  • With easy-align hangers and anti-slip bolt lugs for quicker and easier rocker installation
  • All necessary hardware included for complete installation

Applications

  • Tandem axle trailers
  • Utility trailers
  • Livestock or agricultural trailers
  • Equipment or tool transport trailers

Specifications

  • Load Rating: 750 kg per axle (1,500 kg total)
  • Trailer Spring Type: 3-leaf slipper springs
  • Spring Width: 50 mm
  • Leaf Thickness: 6 mm
  • Spring finish: Zinctech anti-corrosion coating
  • Mount Style: Eye/slipper with tandem rocker arm setup

Kit Inclusions

  • 60001 Springs Only 750 kg Zinctech 3 Leaf (2 pairs)
  • 60007 Tandem Rocker Arm Hanger (1 piece)
  • 60006 Tandem Rocker Arm Eye/Slipper Type (1 piece)
  • 60014 Spring Hanger Bolt M16 x 95 mm (4 pieces)
  • 60015 Spring Hanger Nut M16 Nyloc (4 pieces)
  • 60008 Tandem Rocker Arm Centre Bolt M20 x 195 mm (1 piece)
  • 60009 Tandem Rocker Arm Centre Nut M20 Nyloc (1 piece)
  • 60010 Tandem Rocker Arm Slipper Bolt M10 (2 pieces)
  • 60011 Tandem Rocker Arm Slipper Nut M10 Nyloc (2 pieces)
  • 60013 Spring Hanger 16 mm Eye, Suits 50 mm Spring (2 pieces)
  • 60012 Spring Slipper, Suits 50 mm Spring (2 pieces)

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

Specifications

Brand: Treadway
Load Rating: 1500kg
Type/Finish: Zinctech
Width: 50mm

Questions?

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