Description

This 2,500 kg tandem axle spring set is built for reliable suspension performance on medium-duty tandem axle trailers. It features high-quality 5-leaf springs with progressive spring compression, and an anti-rattle leaf design for excellent load support and a quieter ride. This kit also includes pre-installed nylon bushes and mounting hardware for a hassle-free checkout and assembly.

Key Features

  • Rated for tandem axle trailers up tp 2,500 kg GVM
  • 5-leaf Zinctech-coated springs with anti-rattle design and longer second leaf for enhanced durability
  • Anti-rattle slippers fit snugly around the springs to further reduce movement and wear
  • Progressive spring compression for better load handling and ride comfort
  • Durable 50 mm wide springs with 6 mm thick leaves
  • With easy-align hangers and anti-slip bolt lugs for quicker and easier rocker installation
  • Includes all essential hardware to complete installation

Applications

  • General-purpose utility trailers
  • Domestic and commercial use
  • Agricultural, trade, and recreational trailers

Specifications

  • Spring rating: 1,250 kg per pair (total 2,500 kg for tandem configuration)
  • Trailer spring type: 5-leaf slipper springs
  • Spring width: 50 mm
  • Leaf thickness: 6 mm
  • Spring finish: Zinctech coating for corrosion resistance

Kit Inclusions

  • 60003 Springs Only 1,250 kg Zinctech 5 Leaf (2 pairs)
  • 60007 Tandem Rocker Arm Hanger (1 pair)
  • 60006 Tandem Rocker Arm Eye/Slipper Type (1 pair)
  • 60014 Spring Hanger Bolt M16 x 95 mm (4 pieces)
  • 60008 Tandem Rocker Arm Centre Bolt M20 x 195 mm (2 pieces)
  • 60009 Tandem Rocker Arm Centre Nut M20 Nyloc (2 pieces)
  • 60015 Spring Hanger Nut M16 Nyloc (4 pieces)
  • 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

Load Rating: 2500kg
Brand: Treadway
Type/Finish: Zinctech
Width: 50mm

Questions?

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