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

Spring Set Tandem Axle 1500kg Zinctech Inc ubolts & plates to suit 50mm axle

NZ $321.80 excl GST
SKU: 62050
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Description

Ideal for smaller utility, camping, trade, and general-purpose trailers, this complete trailer spring kit includes two pairs of progressive springs designed with anti-rattle leaves and an extended second leaf for enhanced support around the spring eye.

Finished with a durable Zinctech coating, the springs offer excellent resistance to rust and corrosion, ensuring long-lasting performance in both dry and moisture-prone environments. The system comes pre-fitted with nylon bushes and includes tandem rocker arms and all essential mounting hardware, ready to fit light to medium trailer builds up to 1,500 kg.

Key Features

  • Progressive spring compression adjusts to changing loads for better comfort and control
  • Zinctech finish on the springs helps protect against corrosion and environmental wear
  • Leaf springs feature an anti-rattle design for reduced vibration and quieter towing
  • Longer second leaf adds extra support around the eye area
  • Snug-fit anti-rattle slippers help limit movement between parts, reducing wear and noise
  • Rocker components feature easy-align hangers and anti-slip bolt lugs for easier fitment
  • Includes all major components needed for a full suspension assembly, including U-bolts and axle plates

Applications

  • Lightweight tandem axle trailers
  • Box and cage trailers
  • General-purpose domestic trailers
  • Trade and garden trailers
  • Camper trailers or light-duty recreational use
  • Small mobile food units or tool haulers

Specifications

  • Spring rating: 750 kg per pair (1,500 kg total)
  • Trailer spring typre: Eye/slipper
  • Spring width: 50 mm
  • Leaf count: 3 per spring
  • Leaf thickness: 6 mm
  • Spring finish: Zinctech anti-corrosion coating
  • U-Bolt: 123 mm long x 51 mm wide, M12 thread (suits 50 mm box axle)

Kit Inclusions

  • 60001 Springs Only 750 kg Zinctech 3 Leaf (2 pairs)
  • 60007 Tandem Rocker Arm Hanger (1 piece)
  • 60006 Tandem Rocker Arm Eye/Slipper Type (1 piece)
  • 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 (1 piece)
  • 60009 Tandem Rocker Arm Centre Nut M20 Nyloc (1 piece)
  • 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
Load Rating: 1500kg
Type/Finish: Zinctech
Width: 50mm

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