Axles & Suspension Spring Sets Tandem Axle Kits

Spring Set Tandem Axle 2500kg Zinctech Inc ubolts & plates to suit 50mm axle

NZ $868.50 excl GST
SKU: 62052
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Description

Rated for trailers up to 2,500 kg GVM, this trailer spring set features high-strength 5-leaf springs coated with Zinctech for superior corrosion resistance and durability. The anti-rattle design and extended second leaf enhance load stability and reduce vibration, while progressive compression ensures smoother handling under varying loads.

This all-in-one kit includes snug-fit slippers, easy-align hangers, anti-slip bolt lugs, U-bolts, axle plates, and all required hardware for a 50 mm axle setup—a reliable, ready-to-install solution for new builds or repairs.

Key Features

  • 5-leaf Zinctech-coated trailer springs for superior resistance to wear, rust, and corrosion
  • Anti-rattle leaf design and extended second leaf for quieter, more stable performance
  • Progressive spring compression adapts to different loads for better ride comfort
  • 50 mm wide springs with 6 mm thick leaves for enhanced strength
  • Anti-rattle slippers fit tightly around the springs to reduce movement and wear
  • Easy-align hangers and anti-slip bolt lugs for faster rocker arm setup
  • U-bolts and axle plates included for 50 mm axles
  • Complete kit includes all required hardware for full installation

Applications

  • Medium-duty tandem axle trailers up to 2,500 kg GVM
  • General-purpose trailers for trade, farming, or recreational use
  • Boat trailers and watercraft haulers
  • Plant and equipment trailers
  • Enclosed cargo trailers and box trailers

Specifications

  • Spring rating: 1,250 kg per pair (total 2,500 kg for tandem setup)
  • Trailer spring type: Eye-to-slipper
  • Spring width: 50 mm
  • Leaf thickness: 6 mm
  • Number of leaves per spring: 5
  • Spring finish: Zinctech coating
  • Axle compatibility: 50 mm

Kit Inclusions

  • 60003 Springs Only 1,250 kg Zinctech 5 Leaf (2 pairs)
  • 60023 Galvanised U-Bolt 123L x 51W M12 Suits 50mm Box (8 pieces)
  • 60016 Galvanised Axle Plate to suit 50mm Axle (4 pieces)
  • 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)
  • 60015 Spring Hanger Nut M16 Nyloc (4 pieces)
  • 60008 Tandem Rocker Arm Centre Bolt M20 x 195 mm (2 pieces)
  • 60009 Tandem Rocker Arm Centre Nut M20 Nyloc (2 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

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

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