Axles & Suspension Spring Kits Single Axle Spring Kits

Spring Set Single Axle 750kg Zinctech Inc ubolts & plates to suit 50mm axle

NZ $225.30 excl GST
SKU: 61051
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Description

This comprehensive suspension kit is tailored for single-axle trailer builds up to 750 kg GVM. Engineered with durability and ease of installation in mind, the  Zinctech-coated progressive trailer springs are made from high-tensile, 50 mm wide, 6 mm thick leaves, and features a longer second leaf and an anti-rattle design to reduce wear and improve ride stability.

This set also includes all essential hardware, U-bolts and plates to mount securely to a 50 mm wide square axle.

Key Features

  • Zinctech-coated trailer springs  
  • Anti-rattle design for quieter performance
  • Longer second leaf for enhanced eye support
  • Progressive spring compression for a more stable ride whether laden or unladen
  • Bushes pre-installed for quicker assembly
  • Complete bolt-on system for trailer builders or upgraders

Applications

  • Domestic and utility trailers
  • Box trailers
  • Garden and light commercial trailers
  • General-purpose trailers requiring a 750 kg suspension setup

Specifications

  • Load Capacity: 750 kg per axle (pair)  
  • Trailer Spring Type: Eye-to-slipper
  • Number of Leaves: 3 per spring
  • Spring Width: 50 mm
  • Leaf Thickness: 6 mm
  • Spring Finish: Zinctech coating

Kit Inclusions

  • 60001 Springs Only 750 kg Zinctech 3 leaf (1 pair)
  • 60023 Galvanised U-Bolt 123L x 51W M12 suits 50 mm box (4 pieces)
  • 60016 Galvanised Axle Plate to suit 50 mm axle (1 pair)
  • 60014 Spring Hanger Bolt M16 x 95 mm (1 pair)
  • 60015 Spring Hanger Nut M16 Nyloc (1 pair)
  • 60013 Spring Hanger 16 mm eye suits 50 mm spring (1 pair)
  • 60012 Spring Slipper suits 50 mm spring (1 pair)

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 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 

Questions?

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