Axles & Suspension Trailer Spring Kits & Suspension Components Tandem Axle Trailer Spring Kits

Spring Set Tandem Axle 2000kg Zinctech Inc ubolts & plates to suit 50mm axle

NZ $865.00 excl GST
SKU: 62051
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Description

Designed with comfort and long-term durability in mind, this 2,000 kg tandem axle trailer spring set delivers reliable suspension performance for light to medium trailer applications. The kit features heavy-duty 5-leaf springs with a Zinctech anti-corrosion coating, engineered with progressive compression for smoother load handling and enhanced stability.

The anti-rattle leaf design helps minimise vibration, resulting in a quieter, more comfortable towing experience. Supplied with U-bolts, axle plates, pre-installed nylon bushes, and all essential mounting hardware, this is a complete, ready-to-install trailer spring set straight out of the box.

Key Features

  • Heavy-duty 5-leaf Zinctech springs deliver reliable support and load stability
  • Higher-rated springs to ensure reliability under heavy loads
  • Progressive compression adapts to changing weight for smoother towing
  • Anti-rattle spring and slipper design helps reduce vibration and component wear
  • Longer second leaf reinforces the eye area
  • Rocker arms feature easy-align hangers and anti-slip bolt lugs for faster installation
  • All hardware included—U-bolts, axle plates, and fasteners—for easier assembly

Applications

  • Medium-duty box trailers or cage trailers
  • General-purpose or tradesman trailers
  • Camping, boat, and recreational trailers
  • Farm, horticultural, and small machinery trailers

Specifications

  • Spring rating: 2,500 kg
  • Trailer spring type: 5-leaf slipper springs with Zinctech coating
  • Spring width: 50 mm
  • Leaf thickness: 6 mm
  • U-bolt size: 123 mm (L) x 51 mm (W), M12 thread
  • Designed to suit 50 mm square axles

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)
  • 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)
  • 60023 Galvanised U-Bolt 123L x 51W M12, Suits 50 mm Box (8 pieces)
  • 60016 Galvanised Axle Plate to suit 50 mm Axle (4 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
Width: 50mm
Load Rating: 2000kg
Type/Finish: Zinctech

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