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

Spring Set Tandem Axle 3000kg Zinctech Inc ubolts & plates to suit 50mm axle

NZ $880.20 excl GST
SKU: 62053
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Description

Built for stability, and long-term durability, this trailer spring set is designed for tandem axle trailers up to 3,000 kg. The heavy-duty 6-leaf springs are Zinctech-coated to resist rust and corrosion. Their anti-rattle design and extended second leaves deliver quieter performance and greater strength—ideal for demanding towing tasks.

This complete suspension kit also includes anti-rattle slippers, U-bolts, axle plates, and all essential mounting hardware for 50 mm axle setups. Easy-align hangers and anti-slip bolt lugs simplify the rocker arm installation process, making this kit a top choice for trailer builders, repairers, and DIYers looking for a robust, ready-to-install solution.

Key Features

  • 50 mm wide trailer springs with 6 mm thick leaves, coated with Zinctech for durability and rust resistance
  • Progressive spring compression adapts to changing loads for improved comfort and control
  • Anti-rattle spring design and extended second leaf improve ride quality and structural integrity
  • Anti-rattle slippers help further reduce noise and wear
  • Easy-align hangers and anti-slip bolt lugs for quicker, easier installation
  • U-bolts and axle plates included for complete 50 mm axle fitment
  • All required mounting hardware included for full suspension setup

Applications

  • Medium to heavy-duty tandem axle trailers up to 3,000 kg
  • Construction and equipment trailers
  • Livestock and agricultural trailers
  • Car carriers and recovery trailers
  • Enclosed commercial transport trailers
  • Boat trailers

Specifications

  • Spring rating: 1,500 kg per pair (3,000 kg total)
  • Trailer spring type: Eye-to-slipper
  • Number of leaves per spring: 6
  • Spring width: 50 mm
  • Leaf thickness: 6 mm
  • Spring finish: Zinctech corrosion-resistant coating
  • Axle compatibility: 50 mm square

Kit Inclusions

  • 60004 Springs Only 1,500 kg Zinctech 6 Leaf (2 pairs)
  • 60024 Galvanised U-Bolt 133L x 51W M12 Suits 50mm Box (8 pieces)
  • 60016 Galvanised Axle Plate to suit 50mm Axle (4 pieces)
  • 60007 Tandem Rocker Arm Hanger (2 pieces)
  • 60006 Tandem Rocker Arm Eye/Slipper Type (2 pieces)
  • 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

Brand: Treadway
Fixing: U-bolts (50mm)
Load Rating: 3000kg
Type/Finish: Zinctech
Width: 50mm

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