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Spring Set Tri-Axle 3500kg Zinctech
SKU: 63000
Description
Built for tri-axle trailer setups, this trailer spring set delivers consistent performance and strength across three axles with a combined GVM of up to 3,500 kg. Each of the three spring pairs features a 6-leaf, 50 mm wide design with progressive spring compression to adapt smoothly to varying loads.
With anti-rattle leaf construction, longer second leaves for added eye support, and a Zinctech anti-corrosion coating, the springs are suitable for a variety of medium to heavy-duty towing applications. The set comes complete with nylon-bushed springs, rocker arms, hangers, and all mounting hardware—ready for installation.
Key Features
- Suits tri-axle trailers up to 3,500 kg GVM
- 6-leaf Zinctech-coated springs rated at 1,500 kg per axle (pair)
- Progressive spring compression adapts to load shifts, improving ride comfort
- Anti-rattle design helps reduce vibration, wear, and operational noise
- Longer second leaf provides reinforcement around spring eyes
- 50 mm wide x 6 mm thick spring leaves for strength and stability
- Zinctech-coated springs for excellent resistance to environmental factors
- Includes pre-installed durable nylon bushes
- Complete rocker and hanger hardware included for easy installation
Applications
- Tri-axle trailers used in agricultural or farm settings
- Commercial or general freight trailers
- Marine or coastal transport trailers
- Heavy load carriers
- Long-distance hauliers operating across varied terrain
- Custom tri-axle builds with 50 mm spring compatibility
Specifications
- Spring rating: 1,500 kg per axle (3 pairs = tri-axle setup)
- Trailer spring type: 6-leaf slipper springs, progressive compression
- Spring width: 50 mm
- Leaf thickness: 6 mm
- Spring finish: Zinctech anti-corrosion coating
Kit Inclusions
- 60004 Springs Only 1,500 kg Zinctech 6 Leaf (3 pairs)
- 60007 Tandem Rocker Arm Hanger (4 pieces)
- 60006 Tandem Rocker Arm Eye/Slipper Type (4 pieces)
- 60008 Tandem Rocker Arm Centre Bolt M20 x 195 mm (4 pieces)
- 60009 Tandem Rocker Arm Centre Nut M20 Nyloc (4 pieces)
- 60014 Spring Hanger Bolt M16 x 95 mm (6 pieces)
- 60015 Spring Hanger Nut M16 Nyloc (6 pieces)
- 60010 Tandem Rocker Arm Slipper Bolt M10 (4 pieces)
- 60011 Tandem Rocker Arm Slipper Nut M10 Nyloc (4 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 |
| Load Rating: | 3500kg |
| Type/Finish: | Zinctech |
| Width: | 50mm |
Documents
Technical Data Sheet 1Questions?
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